Chapter 1 Overview of Performance Monitoring Function
I-23
(i) History
file
→
Primary summarized file (primary summarizing)
The input is a statistic information history file, and the output is a primary summarized file. In other words, statistic
information in each logging Interval within each period of summarizing in the input file is summarized in units of
hours and the result is recorded in the output file.
(ii) History
file
→
Secondary summarized file (direct primary summarizing)
The input is a statistic information history file, and the output is a secondary summarized file. In other words,
statistic information in each logging interval within each period of summarizing in the input file is summarized in
units of days and the result is recorded in the output file.
(iii) Primary summarized file
→
Secondary summarized file (secondary summarizing)
The input is a primary summarized file, and the output is a secondary summarized file. In other words, statistic
information in each hour within each period of summarizing in the input file is summarized in units of days.
For the enhanced statistic information, the maximum and minimum values are selected from the enhanced statistic
information of the same type recorded in the primary summarized file.
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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 display the data of CSV format file in graphs, allowing review of long-term load fluctuation and performance analysis.
By specifying addition of header upon extracting a CSV file, the header record for the values is added to top of the file.
Editing the statistic information with a header record using a spreadsheet program allows easy identification of the statistic
data values.
CSV Conversion Tool creates CSV files according to the following naming convention. For information on the structure
of a CSV file, refer to Appendix B “CSV File Structure” of this manual.
Naming Convention for CSV Files
“Name of Statistic Information History (Summarized) File”_”Extension of Statistic
Information History (Summarized) File”.csv
Example: Name of the CSV file for the statistic information history file “20020401NECStorage4100.psl”
20020401NECStorage4100_psl.csv
In statistic information history/summarized files, various types of statistic information regarding components of the disk
array are accumulated. You can extract the specified statistic information from the statistic information by giving
extraction conditions to CSV Conversion Tool depending on your purpose. The following extraction conditions can be
