Asset ID:	1-72-1015831.1
Update Date:	2011-07-28
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1015831.1 :   VTL - Slow performance when using Netbackup and VTL  


PreviouslyPublishedAs
224633

Applies to:

Sun StorageTek VTL Plus Storage Appliance - Version: 1.0 - Build 1323 to 2.0 - Build 1656 - Release: 1.0 to 2.0
Sun StorageTek VTL Prime System - Version: 1.0 - Build 1813 to 1.1 - Build 2076   [Release: 1.0 to 1.0]
Sun StorageTek VTL Storage Appliance - Version: 4.0 - Build 1221 to 4.0 - Build 1221   [Release: 4.0 to 4.0]
Sun StorageTek VTL Value System - Version: 1.0 - Build 1323 to 1.0 - Build 1323   [Release: 1.0 to 1.0]
All Platforms
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***Checked for relevance on 19-07-2011*** (dd-mm-yyyy)

Symptoms

• Slow performance on vaulting jobs
• Backup jobs higher data rate
• Backups running at acceptable data rates
• Very low data rates on vault job

Cause

Insufficient number of buffers and  incorrect data block size for optimum performance on VTL.

Solution

Increase NetBackup buffers:
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS = 32
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS = 262144

Refer to Symantec Veritas NetBackup Users Guide for details.

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