Is rehydratation faster with NetBackup 7.5 ?

[Gdd]

Rehydrating data (for example, copying data from deduplicated disk to tape) has been improved in the last versions of NetBackup (7.1.0.4, 7.5).
Does someone has measured the speed of a copy from disk to tape in a 7.1.0.4 or 7.5 configuration with existing Disk Pool ?

Is it really faster and what are the speeds reached?

[revarooo]

I've got no benchmarks but in NetBackup 7.5.0.1 Release notes there is a whole section on rehydration performance improvements.

http://www.symantec.com/business/support/index?page=content&id=DOC5429

[thesanman]

Looks pretty much word for word the same as the section in the v7.1.0.4 release notes.

I'm about to upgrade from v7.1.0.3 to v7.1.0.4 so should have some results in a week or so as the server side rebasing kicks in across my 2 x 10TB MSDP's

[thesanman]

My experience after 2 weeks and my Production backups having done 2 full image cycles is that, in my environment, I've seen 10-20% performance increase for the MSDP to Advanced Disk rehydration.

It's difficult to tell exactly due to environmental factors but certainly it's faster.  Not fast enough for me yet but it's a step in the right direction.

[Gdd]

Thank you for this information.
Could you tell me what is the speed reached, and what are the characteristics of the deduplicated space used ?
Thank you.