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drdale1113
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Dedupe appliance numbers when using Optimal compression

Post by drdale1113 » Aug 12, 2014 3:19 pm

I'm looking for some insight on what kind of dedupe numbers I would see from an applaince when leaving compression at Optimal. Has anyone done this?

The reason I can't go to Dedupe Friendly is the size of the backups increase too much and at this time I have to get these backups in to TSM to get them offsite.

veremin
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Re: Dedupe appliance numbers when using Optimal compression

Post by veremin » Aug 12, 2014 3:32 pm

The reduction rates depend on type of the data stored inside VM - how well it can be deduplicated and compressed. For instance, you wouldn't expect impressive deduplication/compression rates from the VM storing .jpeg images mainly. The rule of thumb is 50 %, though. Because typically you won't see ratios less than that.

Thanks.

drdale1113
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Re: Dedupe appliance numbers when using Optimal compression

Post by drdale1113 » Aug 12, 2014 3:42 pm

So I should see 50% dedupe ratio on something like an Exagrid even after I set it Optimal compression?

foggy
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Re: Dedupe appliance numbers when using Optimal compression

Post by foggy » Aug 12, 2014 3:49 pm

You should see at least 50% with Veeam B&R default settings on any raw storage. Dedupe appliance will probably give you further data reduction (however its proprietary dedupe ratio will be less than with dedupe-friendly Veeam B&R compression level).

tsightler
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Re: Dedupe appliance numbers when using Optimal compression

Post by tsightler » Aug 12, 2014 4:29 pm

Veeam itself will likely provide 50% savings or slightly more on average, when using optimal compression, however, I wouldn't expect the Exagrid to provide much more at that point. It's really hard to predict, but I'm guessing the Exagrid would provide less than 50% additional savings, likely only a very small amount, I'd guess no more than 10-20%, although it might edge slightly higher if you keep mulitple fulls.

Basically, if you're wanting to use a dedupe appliance, they really only make sense if you are sending them full backups.

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