On 03/01/2012 02:15 AM, Steven Langdale wrote:
It looks like Allen has had a better experience, but in my recent experience with ProtecTIER, 2 logical libraries with NetBackup& TSM feeding in the "same data" (we were migrating to TSM) the data WAS "different" and dedupe ratios dropped like a stone.
Keep in mind that my dedupe device is a Data Domain: I don't yet have any TSM-level dedupe deployed at all, at all... I don't know what the dedupe domain is for ProtecTIER, but I do know that in TSM it's the storage pool. I understand the reasons for this, but it does make for some complications; some of us can shove all their data in one big stgpool, but I anticipate some of us cannot.
As for using it as a justification to migrate eveything to TSM, it is obviously true, but in my opinion a weak argument. It could easily be remedied by throwing in some more disk. You should focus on the management costs of running multiple environments.
What he said. :) - Allen S. Rout
