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deduplication question

Created: 22 Oct 2012 • Updated: 22 Oct 2012 | 5 comments

I know the ram requirements for the dedupe option is 8gb for 5tb of dedupe data.  can this ram be virtual memory or does it have to be physical memory.

our server has  20tb of storage but only 6gb ram.  will virtual memory do the trick?

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Backup_Exec's picture

Hi

It has to be physical RAM on the server & were that 8gb of ram should be only dedicated for dedup and other RAM resources for your other application and system resources for server

http://www.symantec.com/docs/HOWTO23357

Thanks

Sameer

Don't forget to give a "Thumbs Up" or Mark as "Solution" if someones advice has helped you.

Nasharat Maner's picture

Hi,

If you want to use deduplication with 6 GB RAM, Backup Exec will give you a warning and let you continue.

However, there is performance hit when job to dedupe device will be running.

So, it's better to use standard configuration recommened by Admin guide.

jermstur's picture

I will purchase some ram.  is it true that 24gigs is the max it can use for dedupe?

Backup_Exec's picture

Hi

No there is nothing like 24 gigs is MAX so there is requirement for minimum 8gb of ram as per the link given above but not on max RAM usage as that would depend on your Operating System and Server

Thanks

Sameer

Don't forget to give a "Thumbs Up" or Mark as "Solution" if someones advice has helped you.

Gurvinder Rait's picture

The requirement is 1.5 GB of RAM for every TB. So if you have a volume that in 10 TB, then RAM required is 15 GB. Backup Exec dedupe engine loads the fingerprints in the memory. So larger the dedupe larger the RAM requirement (1.5 GB of RAM per TB is the base calculation we recommend).