We’ve been doing some VMWare testing with FCP LUNs and A-SIS.

We saw a reduction from 471GB to 21GB with only about a 7% reduction in performance.  More than a fair trade-off in my opinion.

Our testing could have had impact on the performance more than the de-dupe, however.

Glenn

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From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Bill Holland
Sent: Wednesday, February 13, 2008 6:50 AM
To: toasters@mathworks.com
Subject: De-dup'ing Primary Storage

To those of you that have implemented Nearstore and A-SIS on your primary storage:

1.  Have you seen any difference in overall filer performance?

2.  If you have LUNs, how are your space savings on those volumes?

I know that enabling Nearstore does some system tweaking in the background to increase the number of concurrent backup streams that can be running, but I don't know what else it tweaks that may adversely affect performance of a primary storage system.  Afterall, it was originally designed to run as a secondary storage platform.