topic HF20 de-dupe statistics in Array Performance and Data Protection

HF20 de-dupe statistics

RVil — Mon, 11 Feb 2019 13:19:13 GMT

Hi,

Why is it not possible to see different volumes dedupe stastics?

Regards
Robert

Re: HF20 de-dupe statistics

Nick_Dyer — Mon, 11 Feb 2019 14:31:16 GMT

Hello!

Deduplication is performed at the Application Category level, and thus the dedupe results cannot be reported on a per-volume basis as there could be many blocks shared across many volumes that are part of the same Application Category.

If you head to Monitor->Capacity, you can see the dedupe/compression savings on the App Category level there. Alternatively, the overall Pool Capacity figures also include the global dedupe/compression savings.

Re: HF20 de-dupe statistics

RVil — Tue, 12 Feb 2019 08:00:41 GMT

And what exactly do "Application Category level" mean in this case?

Re: HF20 de-dupe statistics

Nick_Dyer — Tue, 12 Feb 2019 16:27:28 GMT

Good question. There's an indepth view of deduplication on Nimble available here: https://community.hpe.com/t5/HPE-Storage-Tech-Insiders/Dedupe-An-Engineer-Looks-Under-the-Hood/ba-p/6986460

Re: HF20 de-dupe statistics

RVil — Thu, 14 Feb 2019 07:45:36 GMT

Then it´s only bad, i have all my volumes set as Virtual Server, as all my volumes is Hyper V attached drives.

Re: HF20 de-dupe statistics

Nick_Dyer — Thu, 14 Feb 2019 12:44:39 GMT

That's ok! If they're CSV attached shared drives, then that's exactly how it should be.

Re: HF20 de-dupe statistics

RVil — Thu, 14 Feb 2019 13:59:30 GMT

I know. I ment, the application statistics is not worth much, as all is reported as the same application :)