Forum Discussion

FlyMountain's avatar
FlyMountain
Level 6
13 years ago

How data buffer size and buffer number effect the Netbackup backup and restore performance?

Lately we are having a performance issue in our Widnow server. After looked into details, we found we had smaller data buffer size and buffer number in our Windows serve compare to our HP-UX server. ...
7.1.x and Earlier
Backup and Recovery
Best Practice
NetBackup
Performance
  • Mark_Solutions's avatar
    Mark_Solutions
    13 years ago

    Felix

    On your Media Servers under \program files\veritas\netbackup\db\ create (if it does not already exist) a folder named "config" - by default this folder only exists on a Master Server.

    In that folder create your buffer files, they are case sensitive and do not have a file extention so make sure your Windows Explorer is not hiding extensions for know file types otherwise they may end up with a .txt on the end.

    From my experience on Windows and using LTO4 or LTO5 drives and also backing up to disk the following work really well as long as Windows paging is also tuned:

    SIZE_DATA_BUFFERS with a value of 262144

    NUMBER_DATA_BUFFERS with a value of 32

    SIZE_DATA_BUFFERS_DISK with a value of 1048576

    NUMBER_DATA_BUFFERS_DISK with a value of 32

    To tune your paging use the following registry keys (need a reboot) - create them if not already there:

    HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management\

    DWORD - PoolUsageMaximum  - Decimal value of 40

    DWORD - PagedPoolSize Hex value of FFFFFFFF (this is 8 x F)

    Hope this helps

Mark_Solutions's avatar
Mark_Solutions
Level 6
13 years ago

Felix

On your Media Servers under \program files\veritas\netbackup\db\ create (if it does not already exist) a folder named "config" - by default this folder only exists on a Master Server.

In that folder create your buffer files, they are case sensitive and do not have a file extention so make sure your Windows Explorer is not hiding extensions for know file types otherwise they may end up with a .txt on the end.

From my experience on Windows and using LTO4 or LTO5 drives and also backing up to disk the following work really well as long as Windows paging is also tuned:

SIZE_DATA_BUFFERS with a value of 262144

NUMBER_DATA_BUFFERS with a value of 32

SIZE_DATA_BUFFERS_DISK with a value of 1048576

NUMBER_DATA_BUFFERS_DISK with a value of 32

To tune your paging use the following registry keys (need a reboot) - create them if not already there:

HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management\

DWORD - PoolUsageMaximum  - Decimal value of 40

DWORD - PagedPoolSize Hex value of FFFFFFFF (this is 8 x F)

Hope this helps