DeDupe - VMware - iSCSI

[AUS_Mike]

Hey Everyone,
Quick question;

I know the usual answer is, don't.. run for the hills, but its usually based on RAM, and Compute,

Scenario

Storage;
24 x 450GB SAS 15k 2.5"
raidz2

Server Head
2 x X5660
128GB Ram ECC (16x8GB)
x520 DP

So with a storage pool of 7-8TB, 128GB Ram, and 2 x 6 Core procs should safely cover dedupe ?

I will test performance out, before making this prod, but from a safety point, is it worth going down the path of testing ?

 

[Ericloewe]

Well, realistic gains are said to be rather low, especially as time goes by and blocks diverge.

 

[HoneyBadger]

Initial success depends entirely on what you're going to host on it. As @Ericloewe mentions, dedupe divergence also bites you very quickly over time, even if you partition your VMs out to separate OS/App/Data - patches and differentials over time will start to hurt your ratio.

If you're running a lot of clusters that communicate at the application layer, and cycling machines in and out of said clusters are easy, you might be able to get away with it.

VDI is a potential use-case for deduplication. General Windows/Linux servers? Not so much.