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Test restore to /dev/null

Hi,

     I want to test restore performance and was wondering if there is a way to restore to /dev/null ?

Many thanks - Darren

 

 

1 Solution

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Accepted Solution!

This is what you are looking

This is what you are looking for :

Documentation: How to use the GEN_DATA file list directives with NetBackup for UNIX/Linux Clients for Performance Tuning

http://www.veritas.com/docs/000091135

The GEN_DATA file directive create random data in memory and store it as real data on disk or tape. But the restored data go nowhere other than memory. Perfect for performance testing.

HIGH RECOMMENDED !

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7 Replies
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Re: Test restore to /dev/null

Nope, not that I have heard of.

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Re: Test restore to /dev/null

I restored /dev/null & it was really quick but nothing was there! 

OK sorry, bad joke. 

----

As to your query, you can try duplicating the image.  See this old thread:

http://www.backupcentral.com/phpBB2/two-way-mirrors-of-external-mailing-lists-3/symantec-netbackup-18/bpverify-1-is-a-joke-is-it-possible-to-restore-to-dev-nul-53379/

 

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Re: Test restore to /dev/null

Why not just restore to an alternate location and delete the contents once you are done?

That is what I would do.

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Re: Test restore to /dev/null

Thanks Will ;-)

We have been restoring to alternate locations but we are seeing some unexplained throughput issues on a particular server and I wanted to rule the disk / I/O out.

 

 

 

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one of two things

Either prove it is disk io, somewhat easy. Or send it somewhere that you are sure is faster than anything in the chain...flash disk, or a RAMdisk (depending on size.)
Highlighted

one of two things

Either prove it is disk io, somewhat easy. Or send it somewhere that you are sure is faster than anything in the chain...flash disk, or a RAMdisk (depending on size.)
Highlighted
Accepted Solution!

This is what you are looking

This is what you are looking for :

Documentation: How to use the GEN_DATA file list directives with NetBackup for UNIX/Linux Clients for Performance Tuning

http://www.veritas.com/docs/000091135

The GEN_DATA file directive create random data in memory and store it as real data on disk or tape. But the restored data go nowhere other than memory. Perfect for performance testing.

HIGH RECOMMENDED !

View solution in original post