Julien Rick

EMC Unity Dedup ratio

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Hello,

We plan to replace our two SC8000 in the next 3 month by a Unity 300 or a SC5020 SAN and we are also looking for full flash as an option.

Deduplication ratio announced by vendors are always really optimistic, what's your dedup ratio "in the real life" on a Unity 450F ? 

The Unity will be used only with VMware.

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It's going to depend entirely on your workload. I think what we've come to find is that 3:1 is pretty typical across a wide range of workloads and industries. In the new release for Unity, pasted below, they're claiming 5:1. 5:1 feels a little aggressive but Dell EMC is generally very conservative with these claims, so there's reason to believe. 

 

https://www.storagereview.com/dell_emc_launches_new_storage_and_data_protection_solutions

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With DR solutions, I don't think you will see a huge difference between different technologies in terms of ratios. Most DR solutions come pretty close to one another in the grand scheme of things. Some that offer background as well as inline can help, but the big difference come into play with the performance overhead.

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