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Novell Open Enterprise Server 2 Скачать руководство пользователя страница 31

Configuring Advanced Features for Traditional Volumes

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Minimum Compression Percentage Gain

Enable File Compression

Maximum Concurrent Compressions

Convert Compressed to Uncompressed Option

Decompress Percent Disk Space Free To Allow Commit

Decompress Free Space Warning Interval

Deleted Files Compression Option

Days Untouched Before Compression

4.1.3 Enabling File Compression for a Traditional Volume

You choose to compress files when you create volumes by setting the File Compression
attribute.You can also set the File Compression attribute later. However, after you enable file
compression for a volume, you cannot turn it off. For instructions on setting file compression for
volumes, directories, and files, see

“Setting Server-Level File Compression Attributes” on page 30

.

The following

set

command parameters affect how file compression behaves. For information on

how to use the

set

command, see “

SET

” in the

OES 2: Utilities Reference

.

“Days Untouched Before Compression” on page 31

“Minimum Percentage Compression Gain” on page 31

Days Untouched Before Compression

Use the

set

command’s parameter named

Days Untouched Before Compression

to set this interval

of inactivity. This parameter specifies the number of days that must pass without access to a file
before the file can be compressed. The parameter uses the date the file was last accessed to gauge
whether a file should be compressed.

Minimum Percentage Compression Gain

To avoid the overhead of uncompressing files that do not compress well, the system calculates the
compressed size of a file before actually compressing it. If no disk space can be saved by
compression, or if the size difference does not meet the value specified by the

set

command’s

parameter named

Minimum Percentage Compression Gain

, the file is not compressed.

4.1.4 Disabling File Compression for a Traditional Volume

File compression is enabled and disabled at the volume level. If you do not enable the File
Compression attribute when you create a volume, you can subsequently enable it using the

set

command. However, after it is enabled, file compression cannot be disabled on the volume unless
you re-create the volume.

You can temporarily suspend file compression using the

set

command’s

Enable File Compression

parameter. For more information, see

Section 4.1.5, “Suspending File Compression,” on page 32

.

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Содержание Open Enterprise Server 2

Страница 1: ...m novdocx en 6 April 2007 OES 2 NetWare Traditional File System Administration Guide Open Enterprise Server 2 S e p te m b e r 2 0 0 7 N E T W A R E T R A D I T I O N A L F I L E S Y S T E M A D M I N...

Страница 2: ...or re export to entities on the current U S export exclusion lists or to any embargoed or terrorist countries as specified in the U S export laws You agree to not use deliverables for prohibited nucle...

Страница 3: ...emarks For a list of Novell trademarks see the Novell Trademark and Service Mark list http www novell com company legal trademarks tmlist html Third Party Materials All third party trademarks are the...

Страница 4: ...novdocx en 6 April 2007...

Страница 5: ...of a Traditional Volume 21 3 11 Setting the Space Quota for a Traditional Volume 22 3 12 Salvaging and Purging Files 22 3 13 Loading and Installing Name Spaces on a Traditional Volume 22 3 14 Storing...

Страница 6: ...te Verify 44 7 1 3 For 16 Bit Disk Adapters Increase the Number of Reserved Buffers Below 16 MB 44 7 1 4 Use Drivers that Support Scatter Gather Functionality 44 7 1 5 Provide a Disk Large Enough for...

Страница 7: ...Contents 7 novdocx en 6 April 2007 8 9 Resolving Volume Mounting Problems Caused by the Name Space Module 55...

Страница 8: ...8 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 9: ...n page 51 Audience This guide is intended for system administrators of a NetWare server that uses NetWare Traditional file systems Feedback We want to hear your comments and suggestions about this man...

Страница 10: ...demark An asterisk denotes a third party trademark When a single pathname can be written with a backslash for some platforms or a forward slash for other platforms the pathname is presented with a bac...

Страница 11: ...e This section discusses the following key concepts Section 1 1 NetWare Traditional Volumes on page 11 Section 1 2 Traditional Volume Segments on page 12 Section 1 3 What s Next on page 13 1 1 NetWare...

Страница 12: ...rties contains the following information The NetWare server the physical volume resides on The volume name recorded when the volume was initialized on the server for example sys The volume s owner Spa...

Страница 13: ...elow to determine where next to go in this document Task Reference Configure and manage Traditional NetWare partitions and volumes Chapter 3 Configuring and Managing NetWare Traditional Volumes on pag...

Страница 14: ...14 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 15: ...ine which parallels the NSS role for storage management on physical servers For information see Using NSS in a Virtual Guest Server Environment in the OES 2 NSS File System Administration Guide For in...

Страница 16: ...16 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 17: ...on page 21 Section 3 10 Expanding the Size of a Traditional Volume on page 21 Section 3 11 Setting the Space Quota for a Traditional Volume on page 22 Section 3 12 Salvaging and Purging Files on page...

Страница 18: ...ree space on the disk to create a Traditional volume With Traditional volumes you assign physical volume segments from physical partitions on multiple devices There are physical limitations in how you...

Страница 19: ...This option means you are making the partition capable of being part of a mirror group You do not actually create the group until you add another mirrored partition to the partition you are creating E...

Страница 20: ...able the Long namespace see Section 3 13 Loading and Installing Name Spaces on a Traditional Volume on page 22 1b For each volume you want to delete locate the volume then click the Delete link next t...

Страница 21: ...o mount the volume when you create it Otherwise you can mount it later 5 Click Create then click OK to confirm 6 After creating a volume you must mount it in order to use it Locate the newly created v...

Страница 22: ...Loading and Installing Name Spaces on a Traditional Volume 1 In Novell Remote Manager for NetWare click Manage Servers Volumes 2 Locate the volume you want to view then click the Name Spaces link next...

Страница 23: ...lume_size in MB block_size in MB Round the size up to the highest number For example adding Macintosh name space to a 100 MB volume with a block size of 4 MB would require 1 MB of additional memory 0...

Страница 24: ...rtition a name label You can rename the partition by modifying the label You can also delete the label Naming or Renaming the Partition Label 1 In Novell Remote Manager for NetWare click Manage Server...

Страница 25: ...Vrepair utility autoloads it uses the default options If you want to use an alternate option load the Vrepair utility manually and set the alternate option before running the Vrepair utility NOTE If...

Страница 26: ...the Vrepair utility to log errors in a text file Select Option 3 to stop the volume repair Select Option 4 to continue with a volume repair after you have stopped it 5 When the repair is complete ans...

Страница 27: ...us For a general description of the Map command see MAP in the OES 2 Utilities Reference When users log in their network search drive is mapped to the current_wpr Directory Map object which points to...

Страница 28: ...28 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 29: ...sion completes NetWare replaces the original with the compressed version of the file if no errors occurred If errors do occur during compression NetWare leaves the original version intact This section...

Страница 30: ...anagement ServicesTM SMSTM can back up and restore files in their compressed state Other applications might decompress them Compressed Volumes Remain Compressed The File Compression attribute can be t...

Страница 31: ...Compression Use the set command s parameter named Days Untouched Before Compression to set this interval of inactivity This parameter specifies the number of days that must pass without access to a f...

Страница 32: ...eted Files on page 32 Section 4 2 3 Purging Deleted Files on page 33 4 2 1 Configuring Salvage for All NSS Volumes on the Server By default all volumes on the server can optionally use the salvage fea...

Страница 33: ...irst out in any of the salvageable areas Purged files cannot be salvaged To purge files and directories as they are deleted use one of these methods Use the set command at the NetWare server console t...

Страница 34: ...34 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 35: ...g activity in a software RAID1 device which can slightly impact the CPU performance for the server Adding additional mirrors after the first contributes to availability but it also incrementally impac...

Страница 36: ...the mirror group All member partitions in the software RAID1 device must have the same sharable status Either all are sharable for clustering or all are not Partitions you add to the software RAID1 de...

Страница 37: ...partitions on several smaller disks are mirrored to similarly sized partitions on one larger disk In this configuration if any of the small disks fail the data on the volume segments can be recovered...

Страница 38: ...rtition to one of the mirror groups in the list 7 Complete the required fields click Create then click OK to confirm your decision If this is a mirrored partition NetWare displays the status as 100 mi...

Страница 39: ...vices for Data Fault Tolerance 39 novdocx en 6 April 2007 This initiates the resynchronization process for the mirror group that contains the partition you selected 2 Check the mirror status to confir...

Страница 40: ...40 OES 2 NetWare Traditional File System Administration Guide novdocx en 6 April 2007...

Страница 41: ...KB The default stripe size is 64 KB Each segment in the software RAID0 configuration should come from a different device You can obtain segments from the same device but this can severely impede the...

Страница 42: ...s in the OES 2 NSS File System Administration Guide After you create the RAID0 use Novell Remote Manager for NetWare to create a Traditional volume on the device Make sure to use the RAID0 for your se...

Страница 43: ...y for Traditional Volumes There are several options for increasing the capacity of your storage disks Section 7 1 1 Saving Disk Space with Block Suballocation on page 43 Section 7 1 2 Disable Read Aft...

Страница 44: ...the Reserved Buffers Below 16 MB parameter to its upper limit 300 The parameter is found in Monitor Available Options Server Parameters Memory For instructions see SET in the OES 2 Utilities Referenc...

Страница 45: ...tional Volumes on page 46 7 2 1 Change Concurrent Disk and Directory Writes for Faster Reads for Traditional Volumes Use this procedure if your server is slow to respond to read requests NOTE This pro...

Страница 46: ...7 3 2 Change Disk and Directory Caching for Faster Writes on page 47 Section 7 3 3 Turn Off Read After Write Verification on page 47 7 3 1 Increase the Number of Concurrent Writes You can increase the...

Страница 47: ...an increase the chance of directory tables becoming corrupted If the parameter is currently at the default value of 0 5 seconds try increasing the value to 2 seconds Increase the value of the Maximum...

Страница 48: ...w Size 4194304 Volume TTS Log File Overflow Size 4194304 Auto TTS Backout Flag On TTS Abort Dump Flag Off TTS UnWritten Cache Wait Time 1 minute 5 9 seconds TTS Backout File Truncation Wait Time 59 mi...

Страница 49: ...te Wait Time 5 minutes 29 6 seconds Allow Deletion Of Active Directories On Maximum Percent of Volume Space Allowed for Extended Attributes 10 Maximum Extended Attributes per File or Path 16 Purge Fil...

Страница 50: ...e Gain 20 Enable File Compression On Maximum Concurrent Compressions 2 Convert Compressed To Uncompressed Option 1 Decompress Percent Disk Space Free To Allow Commit 10 XXX Decompress Free Space Warni...

Страница 51: ...e 55 8 1 Resolving File I O Errors To resolve a file I O error try one or more of the following Make sure that the volume especially volume sys is mounted If the volume is out of disk space error mess...

Страница 52: ...talled correctly The IBM PC Cluster sends a broadcast message during initialization then stops processing if the network is not cabled or terminated properly Check the network boards in all workstatio...

Страница 53: ...wer than 20 add more memory to your server Minor errors usually correct themselves through normal network use For example if a FAT entry is wrong the entry is updated and corrected the next time the t...

Страница 54: ...lume mounts and you can back up the data Have all users log out then unload all NLM programs except the volume s disk drivers Dismount any mounted volumes To remove the name space on a Traditional vol...

Страница 55: ...the server To resolve problems when a Traditional volume cannot mount because the name space NLM program is not loaded do the following Load the name space NLM program then mount the volume Copy the n...

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