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NEC Storage Performance Monitor/Optimizer, User Manual

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NEC Storage Performance Monitor/Optimizer User Manual Download Page 4

6.  In this document, matters to which careful attention needs to be paid will be described as follows: 

Be sure to observe the contents. 

If the indications are ignored and the system is improperly operated, settings which have been already made 

might be affected. 

 

Type of Indication 

Type Description 

 

Describes contents which require special attention during operation. 

 

The First Edition in May 2002 

The Third Edition in April 2003 

 

 

Summary of Contents for Storage Performance Monitor/Optimizer

Page 1: ...NEC Storage Performance Monitor Optimizer User s Manual ...

Page 2: ...poration 2001 2003 No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation The contents of this book may be modified without notice in the future ...

Page 3: ...program products NEC Storage Manager and NEC Storage BaseProduct NEC Storage PerformanceMonitor NEC Storage PerformanceOptimizer 2 This manual is applicable to the program products of the following versions NEC Storage Manager Ver2 1 NEC Storage BaseProduct Ver2 1 3 The term iSM in this text refers to all the NEC Storage Manager program products 4 Trademarks and registered trademarks HP UX is a re...

Page 4: ... observe the contents If the indications are ignored and the system is improperly operated settings which have been already made might be affected Type of Indication Type Description Describes contents which require special attention during operation The First Edition in May 2002 The Third Edition in April 2003 ...

Page 5: ...II 2 4 2 NEC Storage PerformanceOptimizer and Related Product II 3 4 3 System Configuration II 3 4 4 Operation of Performance Optimization Function II 4 4 5 Function Overview II 5 Chapter 5 Installation of Performance Optimization Function II 7 5 1 Server Installation II 7 5 2 Client Installation II 8 5 3 Installation of Work Disks for Optimization II 9 Chapter 6 Operation of Performance Optimizat...

Page 6: ...ii Appendix F Example of Performance Improvement 49 Index 51 ...

Page 7: ...P P Pa a ar r rt t t I I I P P Pe e er r rf f fo o or r rm m ma a an n nc c ce e e M M Mo o on n ni i it t to o or r ri i in n ng g g F F Fu u un n nc c ct t ti i io o on n n ...

Page 8: ...ection of overload and management of statistic information performance information of the past The function allows an administrator to investigate the cause of access performance deterioration detect abrupt increases of accesses and take proper measures against symptoms of failures Note 1 on the business server Thus this function enables constantly stable operation of storage devices Figure 1 1 Co...

Page 9: ...array ports logical disks and physical disks composing logical disks used in operations requiring responsibility such as online processing Also specify monitoring items among those allowed for real time monitoring I O Density transfer rate etc For example to monitor responses to accesses from an application average response time and I O density must be monitored 1 5 1 Real Time Display of Load Sta...

Page 10: ...onger If this is the case it is necessary to review the file arrangement and distribute the load If a write operation onto the disk is slow the cache size is insufficient A write operation onto physical disks may be simultaneously performed This status is confirmed by checking to see if the Write Hit ratio is less than 100 If this is the case it is recommended that the cache size of the disk array...

Page 11: ...es or symptom of a trouble is seen use this function to display the performance information of disk array and disk array components and identify the cause of decreased performances or a fault For details of components composing disk array refer to 3 3 Hardware in the NEC Storage Manager Manual Guide The iSM client screen is capable of displaying the index values for each calculation unit shown in ...

Page 12: ...Chapter 1 Overview of Performance Monitoring Function I 6 Displays the latest load state in bar graphs Figure 1 3 Displaying the Bar Graph ...

Page 13: ...Chapter 1 Overview of Performance Monitoring Function I 7 Displays the latest load state in time series graphs Figure 1 4 Displaying the Time series Graph ...

Page 14: ...the total of the external response time and external I O count during the unit measurement period and dividing the former by the latter v Busy Ratio It is the ratio of operation of physical disk The unit is percentage It is calculated by following expression dividing the operating time of physical disk by the time slot of measured segments vi Read Hit Ratio It is the ratio of case where the READ r...

Page 15: ...age Response Time can be reported as monitored items In principle the sum of the values of a monitored item over all the host ports in one disk array is equal to the sum of the values of the same monitored item over all the disk arrays However in a real world situation some error may exist due to varied sampling time of the statistic information which is the basis of the values of the monitored it...

Page 16: ...collection of performance information by a single disk array unit in certain period is restricted not to obstruct file I O from the application host in the overhead at collection of performance information This tendency is eminent especially when statistic information is being stored simultaneously with real time displaying 1 1 1 5 5 5 2 2 2 M M Mo o on n ni i it t to o or r ri i in n ng g g O O O...

Page 17: ...of physical disks a threshold value may be temporarily exceeded Upon such a case which can occur in usual operation in general exceeding of threshold should not be reported to an administrator Specifying the monitoring conditions shown below can prevent such unnecessary reporting of exceeded threshold 1 Threshold monitoring interval Time interval of judging threshold Default value is the same as D...

Page 18: ...hreshold excess state 1 Time of continued values under threshold Specify the number of threshold monitoring intervals during which a value is kept under threshold For each monitoring item satisfying the conditions threshold excess state is reset If the number of I Os does not reach a minimum number of I Os specified by threshold monitoring conditions the load of applicable interval is recognized a...

Page 19: ...い値超え状態 し きい値監視インタ ーバル ３ 回 し きい値監視インタ ーバル ３ 回 し きい値監視インタ ーバル ３ 回 し きい値監視インタ ーバル ３ 回 し きい値超えの通知 し きい値超えの通知 し きい値超えの通知 iSMク ライアント Figure 1 7 Resetting Threshold Excess State Threshold monitoring interval Detect threshold exceeding Notify threshold excess Notify threshold excess iSM Client Threshold excess state Threshold monitoring intervals 3 times ...

Page 20: ...ormance for efficient use of the disk array A file where statistic information is accumulated is called a statistic information history file The statistic information history file is stored on the iSM management server allowing concentrating extracting and editing data on the server In addition downloading the statistic information history file allows concentrating extracting and editing data on a...

Page 21: ...anges while statistic information is being accumulated accumulation is done to a new statistic information history file ii Disk Array Name This is the name of the disk array Statistic information history files are created for each disk array iii nnn This is a file serial number between 2 and 999 If a file with the same name exists when accumulation of statistic information starts up a serial numbe...

Page 22: ...to affect input output process from the business host Therefore too many disk array components may prevent collecting statistic information within a specified logging interval and may disable starting of the data accumulation process In such a case specifying the automatic adjustment of logging interval in the environment definition of the iSM server adjusts the intervals appropriately and prevent...

Page 23: ...External Average Response Time External Maximum Response Time External Transfer Rate Int I O Count Int Average Response Time Int Maximum Response Time Int Transfer Rate Int I O Count Int Average Response Time Int Maximum Response Time Int Transfer Rate Int I O Count Int Average Response Time Int Maximum Response Time Int Transfer Rate Read Hit External I O Count External Average Response Time Exte...

Page 24: ...Chapter 1 Overview of Performance Monitoring Function I 18 RANK is not accumulated in a statistic information history file ...

Page 25: ...ices by the control device of the disk array in each measurement period The unit is the number of times vi Internal Average Response Time This is the Average Response Time for the input output requests issued to the internal disk devices by the control device of the disk array in each measurement period The unit is microsecond This is calculated by measuring the total of the internal response time...

Page 26: ...shes the following types of loads when it accumulates statistic information Write Statistic information regarding data write operation Write Hit Statistic information about operations that could respond quickly by writing data to cache only It is a subset of Write Read Statistic information regarding data read operation Read Hit Statistic information regarding data read operation which hit cache I...

Page 27: ...ing For statistic information regarding I O count the I O counts within all the measurement periods contained in the period of summarizing are accumulated and the result is the I O count of the period of summarizing Statistic information of average response time On the basis of all average response times and I O counts within applicable summarizing segments total response time and total I O count ...

Page 28: ...3 Inserting configuration information In addition to the statistics information summarized in the method described in previous sections configuration information is also stored in the summarized statistic information file This feature allows easy identification of the various types of statistic information 4 Types of summarized files In order to select an appropriate balance between the time resol...

Page 29: ...a a at t ti i io o on n n Statistic information about disk array collected by iSM is accumulated in statistic information history files and statistic information summarized files This function can extract and output the information to a CSV format file delimited by commas Use of this function allows displaying values of accumulated statistic information Furthermore a spreadsheet program can displa...

Page 30: ...on Tool Period of extraction Component of disk array Type of statistic information In statistic information history summarized files the component information of the disk array is accumulated in addition to statistic information CSV Conversion Tool can also extract component information ...

Page 31: ...al disk RANK 3 Extracting statistic information of the specified type Statistic information can be generally categorized into the following types i Information regarding the number of inputs outputs This information contains the number of inputs outputs the maximum values of input output density IOPS and minimum values of input output density ii Information regarding the response time of the I O p...

Page 32: ... t ti i ic c c I I In n nf f fo o or r rm m ma a at t ti i io o on n n As described in 1 5 3 4 Extracting Statistic Information a user can create CSV format files using the CSV conversion tool and can edit the data using spreadsheet software as required This process makes analysis of the statistic information easier Furthermore use of the functions provided by iSM allows easy analysis without a sp...

Page 33: ...s detection of a performance bottleneck The Performance Detail Report has six types of report detailed report on the whole disk array detailed report on host director ports detailed report on disk director ports detailed report on logical disks detailed report on physical disks detailed report on RANKs The Performance Report Editor creates a Performance Report in accordance with the following nami...

Page 34: ...ort Editor as inputs to provide graphic representation of statistic information The user references a graph to understand the load state of disk array and chronological change in the load The Performance Report Viewer can be used in an environment where Microsoft Excel2000 is installed An iSM client must be installed in the personal computer for using the Performance Report Viewer ...

Page 35: ... at the same time For installing and uninstalling refer to Part I Installation and Setting of NEC Storage Manager of the NEC Storage Manager User s Manual for your OS 2 2 2 1 1 1 3 3 3 E E En n nv v vi i ir r ro o on n nm m me e en n nt t t S S Se e et t tt t ti i in n ng g g To use the performance monitoring function it is necessary to make the environment setting of the iSM server Create setting...

Page 36: ...e applicable to the NEC Storage PerformanceMonitor Refer to Part I Installation and Setting of NEC Storage Manager of the NEC Storage Manager User s Manual for your OS 2 2 2 2 2 2 2 2 2 I I In n ns s st t ta a al l ll l la a at t ti i io o on n n For installing the NEC Storage PerformanceMonitor install the iSM client with specifying a setup type that includes extended functions For installation p...

Page 37: ...tus in a line graph Time series Graph Displays the latest load status in a Bar Graph Bar Graph 2 Numeric Table Display The Numeric Table screen appears upon activating the performance monitor function The screen displays the latest load states in the form of numeric table The Numeric Table screen allows you to monitor the latest load status as well as to perform settings of real time display On th...

Page 38: ... following describes details of the displayed items a Display Refresh Interval A time interval for updating the Performance screen is indicated by the number of seconds Any one of 10 12 15 20 30 and 60 is displayed For specifying a refreshing interval refer to 2 1 3 Environment Setting Example 10 Update every 10 seconds specify 6 as number of updates per minute b Operating state Information acquir...

Page 39: ...ic table into a table indicting applicable calculation unit The numeric table displays the following information in accordance with the calculation unit selected by the procedure i When the Disk Array tab is selected The Numeric Table indicating load statuses by disk array is displayed The rows are all the disk arrays which are currently being monitored by the iSM The columns indicate External I O...

Page 40: ... the selected disk array iv When the Physical Disk tab is selected The Numeric Table indicating load statuses by physical disk of the disk array specified in the combo box is displayed The rows are the physical disks registered as monitoring objects among the physical disks created in the disk array specified in the combo box The columns indicate Internal I O Density Internal Transfer Rate Interna...

Page 41: ...ister the specified logical disks to the Monitor Object list On the other hand selecting logical disks in the Monitor Object list and clicking the Delete button will delete the specified logical disks from the Monitor Object list When you click the OK button all the logical disks currently displayed in the Monitor Object list are formally registered as the monitored logical disks and the dialog bo...

Page 42: ...ject list and clicking the Delete button will delete the specified physical disks from the Monitor Object list When you click the OK button all the physical disks currently displayed in the Monitor Object list are formally registered as the monitored physical disks and the dialog box closes When you click the Cancel button the current Monitor Object list is ignored and the dialog box closes with t...

Page 43: ...e displayed in graphs are displayed in gray On the other hand when you specify a line which shows the latest value click Setting and then point to Delete from Graph the monitored items of the monitoring object is no longer displayed in Time series Graphs In this case the corresponding cells are displayed in the original background color 7 Time Series Graphs display If you select View Time series G...

Page 44: ...d Hit Ratio Write Hit Ratio Busy Ratio This section describes the procedures for displaying a line indicating a threshold index value for overloads on the graph For threshold refer to 3 2 Monitoring Overloads On the Time series Graph screen select a line or multiple lines for which you want to display threshold from the legend display area and then select View Show Threshold in graph On the Time s...

Page 45: ...ending on the setting for Display Refresh Rate For example setting 1 for Display Refresh Rate allows you to see the past information of 24 hours Setting 6 for Display Refresh Rate allows you to see the past information of 3 hours If viewing many time series graphs of monitoring items displayed on a screen is difficult whether to display hide time series graph and displaying order of graphs can be ...

Page 46: ... screen is capable of showing latest load states of seven monitoring items in bar graph format Figure 3 8 shows an example of the display when the ports and logical disks and physical disks are registered for graph display Figure 3 8 Bar Graph Screen The Bar Graph screen consists of the menu area and tool bar for performing various operations the load status display for showing the load status the...

Page 47: ...ant to display threshold from the legend display area and then select Show Threshold in graph from the tool bar The threshold line is displayed on the graph The line is displayed for time zone from the time the threshold is set to the time it is unset When a value exceeded the threshold line hatch lines are displayed until the time when the Release Threshold Excess function is executed The Bar Gra...

Page 48: ...cale check box is checked graph scales are automatically calculated based on the past load states 10 Record Screen Information When you select Record Screen Information from the View menu the current location and size of the Performance Monitoring screen information on display non display of the tool bar and status bar and the size and arrangement of the graph display area and legend display area ...

Page 49: ...eletion settings for graphs performed in the Setting menu and change settings of logical physical disks to be monitored click File and then point to Save of Setting as shown in Figure 3 10 The saved settings are restored when the Performance Monitoring screen opens next time Figure 3 10 Save of Setting Menu ...

Page 50: ...3 Operations of Performance Monitoring Function I 44 12 Performance Monitoring Stop To close the Performance Monitoring screen click File and then click Close Menu as shown in Figure 3 11 Figure 3 11 Close Menu ...

Page 51: ... the threshold column appears next to the current value column as shown in Figure 3 13 to display thresholds of the monitored items specified for each monitoring target Figure 3 12 Threshold Menu Figure 3 13 Numeric Table Screen Displaying Thresholds A blank threshold column indicates that a threshold for the threshold monitoring element has not been specified The Threshold menu is a toggle switch...

Page 52: ...t Threshold menu The Set Threshold dialog appears Figures 3 14 and 3 15 are display samples for setting a threshold by selecting the cell of I O Density of the logical disk number 0003h Figures 3 16 and 3 17 are display samples for setting a threshold by selecting the line of the logical disk number 0003h Note 1 To select a line left click at the left end of the line Note 2 To select a cell left c...

Page 53: ...Chapter 3 Operations of Performance Monitoring Function I 47 Figure 3 15 Set Threshold Dialog When displayed by selecting a cell Figure 3 16 Set Threshold Menu Select a line ...

Page 54: ...en registered when the dialog box opened Furthermore when you specify multiple cells in the list and select Set Threshold the Set Threshold dialog box appears If the component type on the original screen is disk array the thresholds of the selected monitored items for the selected disk array can be changed simultaneously If the component type on the original screen is port logical disk or physical...

Page 55: ...ns dialog specifies the following information 1 Monitoring interval Specifies a time interval for judging threshold For specifying the same value as display refresh time of real time display screen select Same value as the display refresh rate For specifying the same value as definition in the environment setting file click Default 2 Minimum I O count Specifies a lower limit of I O count within th...

Page 56: ...els in the period which the value below a threshold continues When exceeding the number of times of the specified threshold monitoring interval threshold excess state is canceled individually for each monitoring items In case of no setting for releasing threshold excess uncheck Reset Threshold Excess state according to the period below a threshold check box It cancels at the appointed time At the ...

Page 57: ... a threshold that has been specified select a threshold value to be deleted on the Set Threshold dialog and press the Delete key Then click the OK button If the value of the monitored item from which the threshold has been deleted is exceeding the threshold the threshold exceeding state is cleared By clicking Cancel button specified values are ignored Retaining the values shown at opening Set Thre...

Page 58: ...ng Show All Items Specified Threshold menu displays the Show All Items Specified Threshold dialog appears The Show All Items Specified Threshold dialog displays a list of devices with threshold values specified Figure 3 21 Figure 3 21 Show All Items Specified Threshold Dialog The Show All Items Specified Threshold dialog screen displays elements for threshold monitoring by component type such as d...

Page 59: ... I O Density Transfer Rate Average Transfer Length and Average Response Time The physical disk that has a value which has exceeded the threshold is displayed along with the marks appended to the number On the Threshold specified items dialog selecting a device with threshold indicated and clicking Delete button deletes the specified threshold value 8 Thresholds exceeding state clearing When you cl...

Page 60: ...toring by the iSM server The following methods are available for controlling the operation of accumulating statistic information of the disk arrays which satisfy the above requirements Method for using the iSMprflog command Method for controlling from the real time display screen Method for performing settings in the environment definition file Each method will be described below 1 Operations by u...

Page 61: ... you terminate the accumulation of current statistic information of all the disk arrays perform the operation below iSMprflog stop a 2 Operations on the real time display screen The operation procedures will be described below To utilize this function it is required that the user s level be L2 or L3 i Select Operation Start Stop Accumulation of Statistic Information from the menu to display the St...

Page 62: ...t The following two methods are available for downloading statistic information history files Downloading on performance monitoring function screen If the iSM server is operating downloading is executed on the performance monitoring function screen Downloading with FTP tool If the iSM server is not operating downloading with an FTP tool is available For file names of accumulated statistic informat...

Page 63: ...t DATA iv Click Download button Clicking the Download button starts downloading displaying a dialog that indicates progress finished downloading displayed on the dialog indicates successful completion of downloading The downloaded statistic information file allows summarizing extracting and editing by the performance analysis support tool 2 Downloading with FTP tool If the iSM server is not operat...

Page 64: ...ary summarized file YYYY MM NN N psa Secondary summarized file YYYY indicates year 4 digits MM indicates month 2 digits DD indicates day 2 digits and NN N indicates the disk array name Summarizing method Select a method primary summarizing secondary summarizing or direct secondary summarizing of statistic information files If a summarizing period is not an integral multiple of the logging interval...

Page 65: ...March 31 2002 regarding NECStorage4100 are located in the opt iSMsvr etc mon directory Among all files in this directory if you want to summarize all the statistic information history files collected one month before the current time and output secondary summarized files to the same directory enter the following command in a directory and execute it If the current time is April 15 2002 the statist...

Page 66: ... cases as I O count applicable to that condition refer to statistic information items with no fluctuation by changing period of summarizing such as I O density and transfer rate Next summarize statistic information Archiver provides the following two operation methods Operations on the Performance Analysis Supporting Tool screen Select Performance Analysis Supporting Tool on Start menu to display ...

Page 67: ...files are output to the same directory as the statistic information file specified first If the file with the same name exists in the output directory the file is overwritten iv Direct Secondary Summarizing Select this function when you want to enter statistic information history files and directly create secondary summarized files If a primary summarized file is specified as an input file a norma...

Page 68: ...ter the following command and execute it iSMprfarc C Program files NEC iSMsvr etc mon 20020401NECStorage4100 psl As a result the primary summarized file 20020401NECStorage4100 psa on April 1 2002 is created in the current directory To specify a file name or directory name with a space enclose it in double quotation marks Example Example 1 of summarizing when a period is specified Assume that the s...

Page 69: ...tion history files and summarized files in the CSV conversion command the CSV conversion command extracts statistic information and creates CSV files The CSV conversion command creates CSV files in accordance with the following rules If a statistic information history summarized file is specified a CSV format file corresponding to the file is created in the same path If a creating path of CSV form...

Page 70: ...ions such as the period of extraction component of the disk array type of statistic information etc in the CSV conversion command Multiple conditions can be specified simultaneously Examples of extraction are provided below a Extracting statistic information in the specified period Example 1 Extracting statistic information from 10 00 to 15 30 on April 1 2002 iSMprfext file file1 from 20020401 100...

Page 71: ... information of the logical disk of 0020h regarding the number of inputs outputs from 10 00 to 15 30 on April 1 2002 iSMprfext file file1 from 20020401 1000 to 20020401 1530 ld 20 iocnt Example 2 Extracting statistic information of the logical disk of 0020h and the physical disk with the group number 00h and disk number 01h regarding the Transfer Rate before 16 00 on April 1 2002 iSMprfext file fi...

Page 72: ... n n o o of f f O O Op p pe e er r ra a at t ti i io o on n ns s s W W Wi i in n nd d do o ow w ws s s This section will explain how to extract statistic information The CSV Conversion Tool provides the following two operation methods Operations on the Performance Analysis Supporting Tool screen Select Performance Analysis Supporting Tool on Start menu to display Performance Analysis Supporting To...

Page 73: ...is overwritten iii Summarizing Condition Select this function to extract statistic information by specifying extracting conditions In this case at least one extracting condition must be selected from component type and period If summarizing conditions are not specified all statistic information in the specified statistic information file is extracted iv Component Select components for the extracti...

Page 74: ...ied all CSV format files corresponding to the files are created in the path specified by p option If files under the same names exist in the path where the CSV format files are created the existing files are overwritten To specify files or directory that include blanks in their names the names of file or directory must be enclosed by double quotation marks For syntax of iSMprfext command refer to ...

Page 75: ...ter 17 30 on April 1 2002 iSMprfext file file1 from 20020401 1730 b Extracting statistic information of the specific component Example 1 Extracting statistic information of the host port with the director number 10h and port number 0ah iSMprfext file file1 hp 10 a Example 2 Extracting statistic information of the logical disk of 001eh and the physical disk with the group number 00h and disk number...

Page 76: ...ch CSV files are created the file is overwritten ii The maximum number of records of a CSV file is 65 536 If the number of records of a CSV file exceeds 65 536 the CSV Conversion Tool outputs an error message and terminates processing iii Linking CSV files The CSV Conversion Tool creates one CSV file for a statistic information history summarized file Therefore it is not possible to put statistic ...

Page 77: ...refer to Appendix A Commands of the Performance Monitoring Optimization Function of this manual Examples of execution of the iSMprfedit commands will be provided below Example 1 Creating a summary report of the statistic information history file 20020430NECStorage4100 psl iSMprfedit 20020430NECStorage4100 psl Example 2 Creating a summary report of the statistic information history file 20020430NEC...

Page 78: ...ing Tool screen Specify the operations with Edit Tool tab on the Performance Analysis Supporting Tool screen to execute summarizing Figure 3 26 Performance Analysis Supporting Tool Screen Edit Tool i Statistic Info File Specify statistic information history summarized files Multiple files can be specified and statistic information history files and statistic information summarized files can be mix...

Page 79: ...ool You can also create all editing reports by selecting all reports Operations with the editing tool command To perform an editing operation specify an option in the iSMprfedit command and then execute it Similar to the case where the editing tool is operated on the Performance Analysis Supporting Tool screen multiple statistic information history summarized files output directory type of editing...

Page 80: ...xcel2000 is installed An iSM client must be installed in the personal computer for using the graph making tool Figure 3 27 Storage Performance Report Viewer Screen i File You can specify only a detailed report on the whole disk array created by using the editing tool If other files are specified the creation of the graph will fail ii Display items in the graph Specify statistic information to be d...

Page 81: ...ok When you create a graph and then want to create another graph with different settings return to the Storage Performance Report Viewer start screen change the settings and then click the Display Graph button A separate book is created to display the graph The following illustrates an example in which a graph is created by specifying the I O density and Transfer Rate Figure 3 28 Example of Creati...

Page 82: ...ould not be continued A user terminated the accumulation of statistic information due to the specification during the monitoring of performance If log accumulation interval is adjusted automatically for giving a higher priority to file input output from a business host the intervals between the points increase in accordance with the adjusted time interval 3 Editing with spreadsheet software The st...

Page 83: ...P P Pa a ar r rt t t I I II I I P P Pe e er r rf f fo o or r rm m ma a an n nc c ce e e O O Op p pt t ti i im m mi i iz z za a at t ti i io o on n n F F Fu u un n nc c ct t ti i io o on n n ...

Page 84: ... ma a an n nc c ce e e O O Op p pt t ti i im m mi i iz z za a at t ti i io o on n n F F Fu u un n nc c ct t ti i io o on n n As the volume of business data increases day by day the scale and capacity of disk array become larger Access patterns have also been diverted due to the use by multiple business systems To maintain quick response of the business system it is necessary to monitor the load st...

Page 85: ...a at t te e ed d d P P Pr r ro o od d du u uc c ct t t The NEC Storage PerformanceOptimizer is for the following program products NEC Storage BaseProduct NEC Storage PerformanceMonitor NEC Storage ReallocationControl NEC Storage AccessControl 4 4 4 3 3 3 S S Sy y ys s st t te e em m m C C Co o on n nf f fi i ig g gu u ur r ra a at t ti i io o on n n For system configuration examples refer to Chapt...

Page 86: ...onitoring and analyzing Part I Performance Monitoring Function 4 5 1 Bottleneck Detection Support 6 2 Operation on Screen Replacement Plan After detecting bottlenecks replace the logical disks to distribute the loads removing the bottlenecks Use of the replacement plan function can easily prepare an effective planning of replacement 4 5 2 Replacement Plan 6 2 Operation on Screen Replacement Effect...

Page 87: ... pl l la a ac c ce e em m me e en n nt t t P P Pl l la a an n n Upon detecting a physical disk with concentrated I Os bottleneck part logical disks are moved replaced to tune performances This function displays information about the movement destination logical disks which re best suited for the source logical disk This function automatically finds the movement destination logical disks that are h...

Page 88: ... limitation Logical disks cannot be moved in the cases described below When you perform the tuning operation or configuration setting of the disk array please note the following Cases in which logical disks cannot be moved A Moved Material Logical Disk is located in the same RANK as a Work Disk for Optimization A Moved Material Logical Disk and a Work Disk for Optimization are different in capacit...

Page 89: ... of the NEC Storage Manager User s Manual of your OS 5 5 5 1 1 1 3 3 3 E E En n nv v vi i ir r ro o on n nm m me e en n nt t t S S Se e et t tt t ti i in n ng g g You can specify the operating environment of NEC Storage PerformanceOptimizer by using the environment setting of iSM The following is the items to be specified Location of an optimization log file Specify the location of a file which ac...

Page 90: ...anceOptimizer is the same as that of iSM For the operating environment refer to Part I Installation and Setting of NEC Storage Manager of the NEC Storage Manager User s Manual of your OS 5 5 5 2 2 2 2 2 2 I I In n ns s st t ta a al l ll l la a at t ti i io o on n n To install the NEC Storage PerformanceOptimizer specify a setup type that includes the expanding function and install the iSM client F...

Page 91: ...rs of DDR RDR Note 1 In addition the maximum number of Work Disks for Optimization which can be set for each disk array is predetermined The maximum number of Work Disks for Optimization depends on the specification of each disk array Therefore check the number when you configure the settings for the disk array On the other hand for moving cache resident logical disk a logical disk of one logical ...

Page 92: ... operation modes If Work Disks for Optimization are allocated beforehand performance can be tuned without physical disks being added However since it is difficult to predict occurrence of a bottleneck in performance arrangement of Work Disks for Optimization needs to be designed after due consideration Note the following when arranging Work Disks for Optimization at installation of a disk array su...

Page 93: ...ws the NEC Storage PerformanceOptimizer dedicated client screen This section will describe the composition of the screen Figure 6 1 NEC Storage PerformanceOptimizer Screen The screen is divided into eight areas from 1 to 8 as shown in Figure 6 1 Descriptions for each area are as follows 1 Menu Bar Select necessary items from the menu to perform operations For details refer to Help 4 Configuration ...

Page 94: ...play Area Displays the current analysis period Busy Ratio calculation period 4 Configuration Display Area Configuration of the disk array that uses the NEC Storage PerformanceOptimizer is separated into the disk array layer and the RANK layer and displayed in a tree view form Figure 6 2 shows an example of the display Figure 6 2 Example of Display of Disk Array Configuration At the start of the sc...

Page 95: ...sy Ratio Medium Busy Ratio Low Busy Ratio No information When the RANK is not in the Ready mode Attn Fault An icon for the disk array which is not monitored by the iSM server is displayed in gray 5 Detailed Display Area Lists detailed information of the component located one layer below the layer selected in the configuration display area When the iSM server is selected Detailed information of the...

Page 96: ...icon is the same as that of the Configuration Display Area Busy Ratio Displays the Busy Ratio of RANKs For the RANK that does not have valid Busy Ratio information an asterisk is displayed Note When a logical disk in the RANK is moved Busy Ratio information which has been accumulated is no longer related with Busy Ratio information which is to be accumulated after the movement Therefore immediatel...

Page 97: ...lt is occurring Fault Indicates that a RANK fault is occurring Busy Ratio Displays the Busy Ratio of the logical disk For the RANK that does not have valid Busy Ratio information an asterisk is displayed Note When a logical disk in the RANK is moved Busy Ratio information which has been accumulated is no longer related with Busy Ratio information which is to be accumulated after the movement There...

Page 98: ... estimated Busy Ratio of the RANKs after target moved material logical disk selected in the Detailed Display Area have been moved Number Displays icons and logical disk number of Work Disks for Optimization LD Name Displays nicknames of Work Disks for Optimization Status Displays the state of Work Disks for Optimization Detailed Information is the same as that of the logical disks RANK Displays th...

Page 99: ...er has cancelled due to a cancellation request Scheduled Indicates that movement has been registered in schedule Changing schedule Indicates that registered movement schedule is being changed Schedule canceled Indicates that registered movement schedule has been canceled Schedule failed Indicates that register movement schedule has failed Fault Indicates that abnormal termination of the disk trans...

Page 100: ...torage PerformanceOptimizer client has stopped due to a disconnection with the iSM server or a cancellation instruction provided on the Information acquiring dialog screen When the client is connected to the iSM server the operation can be resumed by selecting Update to The Current Information from the menu Interval for updating logical disk transfer progress information Numerical values displayed...

Page 101: ...g which it is expected that there will be a high load on the disk array an analysis period must be adjusted according to such a time zone or period This adjustment allows displaying appropriate Busy Ratios and appropriate analysis for the business system operations This section describes the dialog for specifying an analysis period and the specifying procedures 1 Displaying Analysis Property dialo...

Page 102: ...eck box for the target day of the week Time Zone specification area When specifying a specific time zone as an analysis target you can specify the time zone in the format of n hours from x y 2 Procedures for setting analysis period This section describes the procedures for specifying an analysis period on the Analysis Property dialog Analysis Period tab The specified analysis period can be saved b...

Page 103: ...nalysis period setting Example Setting analysis period Analysis Period to be specified From 10 00 to 17 00 on Thursdays Fridays and Saturdays for the past 20 days Assume that the current date is January 31 2002 Specification on the Setup the Analysis Period dialog screen Period Absolute Date Specify the start day and end day as follows Opening 2002 Year 01 Month 11 Day End 2002 Year 01 Month 31 Da...

Page 104: ...color has spin buttons Use these spin buttons to set the three stages of the Busy Ratio As shown in Table 6 9 three signal colors are provided red yellow and blue Table 6 9 Description of Signal Colors Signal color Meaning Description Red Caution zone The Busy Ratio has reached the Caution zone Tuning is necessary The RANKs reaching caution zone are applicable to Replacement Plan The default value...

Page 105: ... zones and restore the original Busy Ratio zones 6 6 6 2 2 2 3 3 3 S S Se e et t tt t ti i in n ng g g F F Fo o ol l ld d de e er r r t t to o o S S St t to o or r re e e D D Da a at t ta a a For executing Busy Ratio Graph and Replacement Effect Prediction functions the optimization log files recording the Busy Ratio information must be downloaded from the iSM server to iSM client and must be stor...

Page 106: ...performance optimization log file in the specified directory When Busy Ratio Graph or Replacement Effect Prediction function is activated the information is displayed on the basis of the performance optimization log file stored in this folder 6 6 6 2 2 2 4 4 4 S S Sh h ho o ow w wi i in n ng g g t t th h he e e B B Bu u us s sy y y R R Ra a at t ti i io o o G G Gr r ra a ap p ph h h The Busy Ratio...

Page 107: ...ng Select Busy Ratio Graph on the popup menu Menu Select disk array or RANK on the Configuration Display Area or Detailed Display Area and select Operation Busy Ratio Graph Tool button Select disk array or RANK on the Configuration Display Area or Detailed Display Area and select Busy Ratio Graph on the toolbar Figure 6 11 shows an example of displayed the Busy Ratio Graph dialog and Table 6 11 pr...

Page 108: ...ifies start date and end date of a period for displaying the Busy Ratio Graph 2 Specifying display items on Busy Ratio Graph On the Busy Ratio Graph dialog select RANKs or logical disks to be displayed on a Busy Ratio Graph specify start date or end date and then click the Show Graph button Up to 8 RANKs or 8 logical disks are selectable for displaying at the same time 3 Downloading optimization l...

Page 109: ... graph using data already downloaded and clicking OK button displays Busy Ratio Graphs without downloading performance optimization log files form the iSM server In this case Busy Ratio Graphs are displayed for a log accumulation period of the optimization log files that have already been downloaded If the optimization log files of the specified period have already been downloaded for showing the ...

Page 110: ...client Clicking Cancel on the Downloading dialog during execution of download process or closing the main screen of performance optimization function interrupt the download process If a process is interrupted the performance optimization log files must be downloaded again 4 Showing the Busy Ratio Graph Clicking OK button on the Download Selection dialog displays the Busy Ratio Graph screen The Bus...

Page 111: ...end display area Displays the items listed below Number Indicates icons and numbers of RANKs or logical disks LD Name Indicates logical disk name Displayed only when Busy Ratio of logical disks are shown Average Busy Ratio Indicates an average Busy Ratio within the target period Maximum Busy Ratio Indicates a maximum Busy Ratio within the target period Maximum Busy Ratio Detection time Indicates t...

Page 112: ... Plan dialog Three procedures are provided for displaying the Replacement Plan dialog Open a Replacement Plan dialog by one of the following three procedures Popup menu Select Disk Array on the Configuration Display Area or Detailed Display Area and display a popup menu by right clicking Select Replacement Plan on the popup menu Menu Select Disk Array on the Configuration Display Area or Detailed ...

Page 113: ...ose in Work Disk for Optimization Display Area Destination LD Name Destination logical disk names are displayed Source RANK Busy Expected change of Busy Ratio is displayed Destination RANK Busy Expected change of Busy Ratio is displayed On the Replacement Plan dialog selecting a line of a replacement plan on the Replacement plan display area and clicking Start LD Movement button or selecting Start...

Page 114: ...isplaying the Displaying Replacement Effect Prediction graph dialog Display the Replacement Effect Prediction dialog with one of the following procedures Popup menu Select a work disk on Work Disk for Optimization Display Area and display a popup menu by right clicking Select Replacement Effect Prediction on the popup menu Menu Select a work disk on Work Disk for Optimization Display Area and sele...

Page 115: ...ialog Table 6 16 Download Selection Dialog Area Description Show graph after downloading insufficient data Downloads optimization log file recording Busy Ratios onto the iSM client Show graph using data already downloaded Displays Busy Ratio Graph without downloading optimization log file Selecting Show graph after downloading insufficient data and clicking OK button downloads the performance opti...

Page 116: ...wnloading Meanwhile upon attempting execution of Replacement Effect Prediction without downloading performance optimization log file the process results in an error without Replacement Effect Prediction if no data exists in the folder to store data of the iSM client Clicking Cancel on the Downloading dialog during execution of download process or closing the main screen of performance optimization...

Page 117: ...on activation of the Prediction of Replacement screen all ranges specified for the target period are displayed on one screen Graph display area Changes of Busy Ratios of source and destination RANKs before and after moving are displayed in graphs Vertical axis Indicates Busy Ratio Horizontal axis Indicates target period period indicated by markings is variable by value of Graph scale setting area ...

Page 118: ...basis of configuration after the latest change However the change occurs at the end of or after the target period is displayed for average maximum Busy Ratios 6 6 6 2 2 2 7 7 7 S S St t ta a ar r rt t t L L LD D D M M Mo o ov v ve e em m me e en n nt t t If a RANK with Busy Ratio reaching a caution zone or an danger zone is detected the logical disks on the RANK must be moved to balance the I O de...

Page 119: ...gical disk 30 Busy Ratio of the destination RANK 25 Busy Ratio after the moved material logical disk Busy Ratio of the source RANK 60 Busy Ratio of the destination RANK 55 Example 2 Example of incorrect transfer Busy Ratio of the source RANK 90 Busy Ratio of the moved material logical disk 45 Busy Ratio of the destination RANK 25 Busy Ratio after the moved material logical disk Busy Ratio of the s...

Page 120: ... LD Movement on the popup menu Menu Select a work disk for optimization of the movement target on the work disk for optimization display area and select Operation Start LD Movement Tool Bar button Select a destination Work Disk for Optimization from the Work Disk for Optimization Display Area and then click the Start LD Movement button on the tool bar Replacement Plan dialog Click the Start LD Mov...

Page 121: ...cified in a specific case such as a case where the system tuning takes precedence over business operations Start Schedule area This area specifies whether to Start LD Movement immediately or at a specified time Start Immediately Starts logical disk movement operation immediately Start at Specified time Starts logical disk movement operation at a specified time Specifies time of starting moving and...

Page 122: ...l is L1 Movement start time has already past the time on the server Specified source or target logical disks are already in moving process Movement schedule has been registered for a specified source or target logical disk Disk array is not monitored by iSM Disk array RANK or logical disk is faulty 2 Viewing movement progress operation register movement schedule Movement progress operation and reg...

Page 123: ...y affected by the maximum speed Changing canceling movement schedule Due to circumstances that does not allow executing a move at a scheduled time movement start time must be changed or registered movement schedule must be canceled As described above interrupting disk movement changing movement speed and changing canceling movement schedule are unusual operations For such exceptional operations th...

Page 124: ...ging speed i Select the logical disk of which transfer speed you want to change Click the logical disk of which transfer speed you want to change in the Movement Progress Information Display Area ii Displaying the Change LD Movement Speed dialog Three types of procedures are available for displaying the Change LD Movement Speed dialog screen Use any one of them to display the Change LD Movement Sp...

Page 125: ...elect logical disks of movement schedule to be changed or canceled On the Movement Progress Information Display Area click to select logical disks of movement schedule to be changed or canceled ii Display Change LD Movement Schedule dialog Three procedures are provided for displaying the Change LD Movement Schedule dialog Display the Change LD Movement Schedule dialog with one of the following pro...

Page 126: ...Change LD Movement Schedule Dialog iii Change cancel movement schedule For changing time of starting disk movement or time of continuing re execution Change the setting value and click the Change Schedule button For canceling disk movement schedule Click the Cancel Schedule button ...

Page 127: ...ed or preventive maintenance is performed do the following beforehand checking information necessary on the client screen of NEC Storage PerformanceOptimizer and then specifying the information in the command options The following information needs to be specified in the iSMprfctl command Disk Array Subsystem Name of the Disk Array Subsystem containing the Moved Material Logical Disk Specify the n...

Page 128: ...a between the logical disk 000ah and the Work Disk for Optimization 0010h The volume name is specified with the volume format being omitted Select the default volume movement speed auto iSMprfctl start_ldmv arrayname NECStorage3100 10 ldname VOL000a wkldname WK0010 2 Confirmation of movement The start_ldmv function of the iSMprfctl command starts moving a logical disk This command does not wait un...

Page 129: ...re you can confirm the completion of moving by this message 3 Notes The iSMprfctl command is executable only on the server on which NEC Storage Manager is operating Do not execute the command on a Business Server or while NEC Storage Manager is in stopped state The iSMprfctl command is available with a client PC only when Telnet is connected It is not available with Terminal Service ...

Page 130: ...og start a d Disk Array Subsystem name iSMprflog stop a d Disk Array Subsystem name DESCRIPTI ON iSMprflog command starts stops accumulation of statistic information log file This command is executable only when the iSM server is operating Operations are applicable only to the disk array monitored by the iSM server Options start Starts accumulation of statistic information log file stop Stops accu...

Page 131: ...s a file statistic information primary summarized file which summarizes the statistic information for one day in units of hours from the statistic information history file primary summarizing Further more it creates a file statistic information secondary summarized file which summarizes the statistic information for one month in units of days from the primary summarized file secondary summarizing ...

Page 132: ...cating the disk array name and month of collection collection dates of the files minus days with the extension of the summarized file You can specify multiple primary summarized files for different disk arrays or primary summarized files on collection dates in different months mixed together In this case summarizing is performed for each disk array and for each collection month and a statistic inf...

Page 133: ...ons of summarizing files are the same as the secondary summarizing above If statistic information history files and primary summarized files of the same day coexist the primary summarized files are used as input and secondary summarizing is performed In the arguments of the hour and day options specify the target period of summarizing To specify a target period of summarizing you can either specif...

Page 134: ...information record crosses over one boundary of time and ends immediately before the time of obtaining the first statistic information contained in the successive statistic information record crosses over the next boundary of time When summarizing is done every day the period of summarizing starts when the time of obtaining the first statistic information contained in the statistic information rec...

Page 135: ...n items regarding maximum response time the maximum response time in the period of summarizing is selected from the maximum response times in the intervals of the input file The value is provided as the maximum response time after summarizing Average Busy Ratio For statistic information items regarding an average busy ratio the average busy ratio in each interval of the input file is converted to ...

Page 136: ...ng Interval in the period of summarizing are provided as additional information If the input file is a statistic information history file primary summarizing or direct secondary summarizing the maximum and minimum values in the period of summarizing are selected from the average busy ratio in the logging Intervals If the input file is a primary summarized file secondary summarizing the maximum and...

Page 137: ...ion YYYYMMDDNNN NN psa Primary summarized file every hour for one day YYYYMMNNN NN psa Secondary summarized file everyday for one month YYYY Year 4 digit value MM Month 2 digit value from 01 through 12 DD Day 2 digit value from 01 through 31 NNN NN Disk Array Name Identification Number n n in the identification number is a numerical value of 2 or over Not appended when a file of the same name is n...

Page 138: ...ify the component of disk array hp dp ld pd rank as well as multiple options to specify the type of the statistic information iocnt resp rate busy can be specified If multiple options are specified all statistic information which satisfy the specified conditions is extracted Options file File Name Specify statistic information history summarized files Multiple files can be specified and statistic ...

Page 139: ... information of all ports with the specified director number is extracted Director Number When you specify a range of host port numbers link the host port numbers by colons If you specify a range statistic information of all host ports in the range is extracted Director Number Port Number Director Number Port Number dp Disk Port Port in Disk Director Specified if you want to extract statistic info...

Page 140: ...nt to retrieve statistic information on the specified RANK For the identification number specify the RANK number or the range of RANK numbers Up to 10 RANKs can be specified To specify multiple RANKs separate them by spaces You can omit the RANK number In this case statistic information for all RANKs is retrieved A RANK number is expressed by linking a group number in hexadecimal and RANK number i...

Page 141: ...tistic information history summarized files specified all the CSV files for the statistic information history summarized files are created in the path specified by this option If this option is omitted the CSV files are created in the same path as the statistic information history summarized files To specify a path name with spaces enclose it in double quotation marks compo Specified if you want t...

Page 142: ... port number 1 to director number 20 and port number 10 iSMprfext file file1 hp 10 1 20 10 The following extracts only statistic information of logical disks with the logical disk number a iSMprfext file file1 ld a The following extracts only statistic information of logical disks with the logical disk number from a to 20 iSMprfext file file1 ld a 20 The following extracts only statistic informati...

Page 143: ...g the number of inputs outputs to 17 30 April 30 2002 iSMprfext file file1 to 20020430 1730 iocnt The following extracts only statistic information regarding the Transfer Rate of host ports with the director number 10 and port number 1e iSMprfext file file1 hp 10 1e rate The following extracts configuration information as well as statistic information iSMprfext file file1 compo The following extra...

Page 144: ...s report summarizes the following statistic information Entire disk array Host director port Disk director port Logical Disk Physical Disk RANK ii Performance detail report Six types of report are created Entire disk array performance detail report RANK performance detail report Host director port performance detail report Disk director port performance detail report Logical disk performance detai...

Page 145: ...ion history summarized files are created in the specified directory If this option is omitted reports are created in respective statistic information history summarized files and directories If a report of the same name exists the report is overwritten with the latest data nosum Inhibits output of a performance summary report det Outputs a performance summary report You can specify the option to d...

Page 146: ...his example creates a performance summary report under the directory C tmp only for Windows iSMprfedit o C tmp file1 This example creates a performance summary report and all the performance detail reports iSMprfedit det all file1 This example creates only an entire disk array report iSMprfedit nosum det file1 This example creates only a logical disk performance detail report iSMprfedit nosum det ...

Page 147: ...Appendix A Commands of Performance Monitoring Optimization Function 18 for Windows iSMprfedit o C tmp file1 file2 ...

Page 148: ...the low load RANK as the destination are dedicated disks called work disks for optimization The work disks for optimization need to be preset by the LD Administrator function of iSM Do not attempt to move the following logical disks in order to maintain the effect of tuning Be very careful in determining the disk array configuration The capacity of the logical disk to be moved is different from th...

Page 149: ...on method is the same as for the ldn option wkldname Nickname of the work disk for optimization Specify the nickname of the work disk for optimization The specification method is the same as for the ldname option speed LD movement speed Specify the speed at which data is copied when the logical disk is moved auto The disk array automatically adjusts the LD movement speed in accordance with the loa...

Page 150: ...X The volume name of the logical disk to be moved is nx1 c22 and the volume name of the logical disk for optimization is nx1 c23 Select the default LD movement speed auto iSMprfctl start_ldmv arrayname NECStorage4100 10 ldname NX nx1 c22 wkldname NX nx1 c23 Example Move a logical disk by specifying the nickname Omit the volume formats The volume name of the logical disk to be moved is nx1 c22 and ...

Page 151: ...tes the order of the data separated by commas in the record The save location of the leftmost data is 1 Save Location Field name header specified Content Format Description 1 R_FHDR Record identifier String R_FHDR is set 2 Date Date yyyy mm dd yyyy Year mm Month dd Day Date when information in the statistic information history summarized file was collected 3 Time Time hh mm ss hh Hour mm Minute ss...

Page 152: ...arizing in the table have the following meaning respectively Accumulation Period The period in which statistic information of the statistic information history file is accumulated It corresponds to logging interval time Summarizing Period The period in which statistic information of the statistic information history file is summarized It is either 1 hour or 1 day The shaded parts in the table are ...

Page 153: ... O in period of accumulation summarizing 16 Average Others Response Time micro sec Average response time of Other I O Decimal Average response time microsecond of Other I O in period of accumulation summarizing 17 Max Others Response Time micro sec Maximum response time of Other I O Decimal Maximum response time microsecond of Other I O in period of accumulation summarizing 18 Others Transfer Rate...

Page 154: ...ecimal Director number of the disk port 6 Port No Port number Hexadecimal Port number of the disk port 7 Write Count Write I O count Decimal Total count of Write I O in period of accumulation summarizing 8 Average Write Response Time micro sec Average response time of Write I O Decimal Average response time microsecond of Write I O in period of accumulation summarizing 9 Max Write Response Time mi...

Page 155: ...21 Max Read Transfer Rate KB S Max transfer rate of Read I O Decimal Maximum transfer rate kilobyte second of Read I O in each accumulation period in the period of summarizing 22 Min Read Transfer Rate KB S Min transfer rate of Read I O Decimal Minimum transfer rate kilobyte second of Read I O in each accumulation period in the period of summarizing iii Statistic information record format for phys...

Page 156: ...tion summarizing 17 Max Write Count Max of I O density of Write I O Decimal Maximum value of I O density of Write I O in each accumulation period in the period of summarizing 18 Min Write Count Min of Write I O Decimal Minimum value of I O density of Write I O in each accumulation period in the period of summarizing 19 Max Write Transfer Rate KB S Max transfer rate of Write I O Decimal Maximum tra...

Page 157: ... sec Average response time of Write I O Decimal Average response time microsecond of Write I O in period of accumulation summarizing 8 Max Write Response Time micro sec Maximum response time of Write I O Decimal Maximum response time microsecond of Write I O in period of accumulation summarizing 9 Write Transfer Rate KB S Transfer rate of Write I O Decimal Transfer rate kilobyte second of Write I ...

Page 158: ...etch Read Hit Response Time micro sec Average response time of PrefetchHit Read I O Decimal Average response time microsecond of PrefetchHit Read I O in period of accumulation summarizing 24 Max Prefetch Read Hit Response Time micro sec Maximum response time of PrefetchHit Read I O Decimal Maximum response time microsecond of PrefetchHit Read I O in period of accumulation summarizing 25 Prefetch R...

Page 159: ... of CacheHit Read I O Decimal Maximum value of I O density of CacheHit Read I O in each accumulation period in the period of summarizing 40 Min Read Hit Count Min of I O density of CacheHit Read I O Decimal Minimum value of I O density of CacheHit Read I O in each accumulation period in the period of summarizing 41 Max Read Hit Transfer Rate KB S Max transfer rate of CacheHit Read I O Decimal Maxi...

Page 160: ...tory file is saved as it is 5 Pd Group No Group number Hexadecimal Physical disk group number 6 Rank No RANK number Hexadecimal RANK number 7 Write Count Write I O count Decimal Total count of Write I O in period of accumulation summarizing 8 Average Write Response Time micro sec Average response time of Write I O Decimal Average response time microsecond of Write I O in period of accumulation sum...

Page 161: ...Min Read Count Min of I O density of Read I O Decimal Minimum value of I O density of Read I O in each accumulation period in the period of summarizing 23 Max Read Transfer Rate KB S Max transfer rate of Read I O Decimal Maximum transfer rate kilobyte second of Read I O in each accumulation period in the period of summarizing 24 Min Read Transfer Rate KB S Min transfer rate of Read I O Decimal Min...

Page 162: ...umber of the disk array 6 Name Device name String Name of the disk array 7 Saa SAA String SAA of the disk array 8 Ld Num No of logical disks Decimal No of logical disks of the disk array 9 Pd Num No of physical disks Decimal No of physical disks of the disk array 10 Product Revision Product revision String Product revision of the disk array ii Configuration information record format for host ports...

Page 163: ...ormation record format for logical disks Save Location Field name header specified Content Format Description 1 R_COMPO_LD Record identifier String R_COMPO_LD is set 2 Date Date yyyy mm dd yyyy Year mm Month dd Day Date when configuration information in the record was collected 3 Time Time hh mm ss hh Hour mm Minute ss Second Time when configuration information in the record was collected 4 No Log...

Page 164: ...rial number String Serial number of the physical disk 9 Product Name Product ID String Product ID of the physical disk vi Configuration information record format for RANK Save Location Field name header specified Content Format Description 1 R_COMPO_RANK Record identifier String R_COMPO_RANK is set 2 Date Date yyyy mm dd yyyy Year mm Month dd Day Date when configuration information in the record w...

Page 165: ...ber Hexadecimal Number of the logical disk whose name was changed 5 Name New logical disk name String Logical disk name after change viii Configuration change record format Save Location Field name header specified Content Format Description 1 R_COMPO_CHG Record identifier String R_COMPO_CHG is set 2 Date Date yyyy mm dd yyyy Year mm Month dd Day Date when configuration of the disk array was chang...

Page 166: ...f the RANK for which the source logical disk has been bound 5 Rank No RANK number of the source logical disk Hexadecimal RANK number of RANK for which the source logical disk has been bound 6 Ld No Source logical disk number Hexadecimal Source logical disk number 7 Pd Group No work disk Group number of the destination logical disk Hexadecimal Physical disk group number of the RANK for which the de...

Page 167: ... ratio r hit pref hit w hit 128 29 5 67 45 30 9 30 26 74 97 96 87 73 0 00 HOST DIRECTOR PORT PERFORMANCE no iops trrate MB s av len KB av resp ms w ratio 00h 00h 128 29 5 67 45 30 9 30 26 74 01h 00h 0 00 0 00 0 00 0 00 0 00 DISK DIRECTOR PORT PERFORMANCE no iops trrate MB s av len KB av resp ms w ratio 00h 00h 0 00 0 00 0 00 0 00 0 00 00h 01h 228 28 10 78 48 34 8 33 44 63 LOGICAL DISK PERFORMANCE ...

Page 168: ...accumulation period pref hit Ratio percent of prefetch hit read I O among cache hit read I O in the accumulation period w hit Ratio percent of cache hit write I O in the accumulation period busy Average busy ratio percent in the accumulation period is displayed if the information of the busy ratio does not exist 2 Entire Disk Array Subsystem Performance Detail Report Chronologically displays stati...

Page 169: ...ort based statistic information on the host director port extracted from the statistic information file Below is shown a display image file name 20010529NECStorage4100_psl_hp txt HOST DIRECTOR PORT PERFORMANCE REPORT disk array name NECStorage4100 port no 00h 00h date time iops trrate MB s av len KB av resp ms w ratio total read write total read write total read write total read write 01 05 29 18 ...

Page 170: ...d I O write External I O density for write I O trrate External transfer rate megabyte second in the accumulation period total External transfer rate for all I O read External transfer rate for read I O write External transfer rate for write I O av len External average transfer length kilobyte in the accumulation period total External average transfer length for all I O read External average transf...

Page 171: ... 8 45 8 02 44 71 01 05 29 18 32 264 82 148 90 115 92 12 29 7 77 4 52 47 52 53 44 39 92 8 36 8 38 8 35 43 77 port no xxh xxh PERFORMANCE REPORT SUCCESSFUL Explanation of display items Display item Explanation disk array name Nickname of the disk array port no Number of the disk director port Leftmost position configuration change mark An asterisk is displayed immediately after change in the disk ar...

Page 172: ...00 01 05 29 18 32 138 98 100 06 38 92 6 34 4 10 2 25 46 75 41 91 59 17 10 11 0 77 34 15 28 00 93 08 85 94 0 00 disk no xxxxh evn nnnnnnnnnnnnnnnnnnnnnnnn PERFORMANCE REPORT SUCCESSFUL cache hit read prefetch write 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 cache hit read prefetch write 99 37 89 28 0 00 98 94 86 95 0 00 99 45 87 87 0 00 93 08 85 94 0 00 Explanation of display items...

Page 173: ...ORT disk array name NECStorage4100 disk no 00h 00h date time iops trrate MB s av len KB av resp ms w ratio total read write total read write total read write total read write 01 05 29 18 17 36 75 20 07 16 68 1 66 1 04 0 63 46 37 52 96 38 44 7 76 8 04 7 43 45 38 01 05 29 18 22 54 24 29 89 24 35 2 50 1 58 0 92 47 27 54 27 38 68 7 66 7 86 7 43 44 90 01 05 29 18 27 56 62 31 06 25 56 2 59 1 63 0 96 46 ...

Page 174: ...nternal transfer rate megabyte second in the accumulation period total Internal transfer rate for all I O read Internal transfer rate for read I O write Internal transfer rate for write I O av len Internal average transfer length kilobyte in the accumulation period total Internal average transfer length for all I O read Internal average transfer length for read I O write Internal average transfer ...

Page 175: ...8 43 16 90 0 00 16 90 252 80 0 00 252 87 23 39 14 32 23 39 99 97 53 56 02 09 27 12 57 47 69 20 31 27 38 11 80 5 07 6 73 253 31 255 55 251 65 23 08 19 45 25 78 57 41 30 68 02 09 27 13 07 0 24 0 00 0 24 0 00 0 00 0 00 0 00 0 00 0 00 12 19 0 00 12 19 100 00 0 20 rank no 00h 01h date time iops trrate MB s av len KB av resp ms w ratio busy total read write total read write total read write total read w...

Page 176: ...ical disk has been transferred to the RANK from another RANK by the performance optimization function date time Date and time when statistic information was collected iops I O density number of times second in the calculating period trrate External transfer rate megabytes second in the calculating period av len External average transfer length kilobytes in the calculating period av resp External a...

Page 177: ... the RANKs h 32 i j When the quotient of Number of LDs in a RANK 2 16 is a and the remainder is b b 0 i a 1 16 b 0 i a 16 When the quotient of Number of PDs in a RANK 1 16 is c and the remainder is d d 0 j c 1 16 d 0 j c 16 B 80 Number of HPs 112 Number of DPs 48 Number of LDs 96 Number of PDs 64 Number of RDs 272 Number of CACHE 272 Number of RANKs 64 The size of the statistic information primary...

Page 178: ...y with the number of HPs 2 DPs 2 LDs 8 PDs 8 no RDs the number of CACHE 1 and the number of RANKs 2 the number of LDs and PDs is 4 the size of the statistic information history file obtained by accumulating statistic information for one day based on the logging Interval time of 5 minutes A 272 2 4 2 4 8 48 8 48 0 16 1 16 32 16 16 32 16 16 1 200 B 80 2 112 2 48 8 96 8 64 0 272 1 272 2 64 2 080 The ...

Page 179: ...over the file size calculated by the equations above assumes a general case If the configuration is changed or a logical disk is transferred during the statistic information accumulation period the actual file size becomes larger than the calculated size Example With regard to the disk array with the number of RANKs 10 and LDs 160 the size of the performance optimizing log file obtained by accumul...

Page 180: ...ce capabilities using the performance monitoring function By converting statistic information history files summarized files into CSV format files and using tools like Microsoft Excel2000 graphs shown in the following figure are created Note 1 Note 1 The disk capacities and RAID configuration of disks are examples for reference Note that they does not necessarily indicate actual processing capabil...

Page 181: ... when clients sending receiving messages and logging off occurs concurrently and it exceeds disk capabilities Stable operations are expected under operation of using 60 to 70 of total disk capability Addition of extra disk devices is desired Number of writing accesses is greater than that of reading accesses RAID5 has a risk of excessive loads on disk by write penalty RAID10 is more suitable for a...

Page 182: ...tting threshold excess state I 46 D danger zone II 22 detailed display area II 13 direct secondary summarizing I 57 disk array I 9 disk array layer II 13 disk director port performance detail report I 24 14 40 display refresh interval I 28 display refresh rate I 9 downloading statistic information I 52 E editing statistic information I 23 I 67 editing tool I 67 I 68 entire disk array performance d...

Page 183: ... screen I 62 I 68 performance detail report I 24 14 performance monitoring starting I 27 performance monitoring stop I 40 performance optimizing log file 48 performance report I 23 performance summary report I 23 13 14 36 physical disk I 9 physical disk performance detail report I 24 14 42 port I 9 prefetch hit I 18 preparation for graph display I 32 primary summarizing I 20 R RANK layer II 13 RAN...

Page 184: ...n I 50 T threshold deletion I 47 threshold display I 41 threshold exceeding state clearing I 49 threshold monitoring condition setting I 45 threshold setting I 42 time series graphs display I 33 tool bar I 28 II 12 U unit to sum up I 9 V viewing movement progress operation register movement schedule II 40 W work disk for optimization II 9 work disk for optimization display area II 15 working I 28 ...

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