topic Re: Dedude Ratio in ONTAP Discussions

Dedude Ratio

lethaniel — Wed, 04 Jun 2025 13:06:58 GMT

What are the average dedupe ration for an 100% vmware deployment.

Re: Dedude Ratio

ZaphodBbx — Thu, 15 Nov 2018 18:20:30 GMT

This is very much a "How high is up?" question.

I have an AFF A700, and a FAS 9000 with only ESX hosts attached running Ontap 9.4P1. The A700 has all efficiency functions enabled, the FAS9000 is only using inline compression/compaction. Both arrays are delivering block level services via FC, with no filer protocols in use.

Some guests have data that has already been significantly compressed/deduped, and for these even 1.15:1 is reasonable.

On some other guests I have seen 2.5:1 just with compression/compaction.

Those numbers are without snapshots or cloning.

I look at efficiency with regard to placing things on the flash or spinning disk unit. If it doesn't need high IOPS/low latency, and it isn't very efficient, it goes on spinning disks.

Re: Dedude Ratio

SpindleNinja — Thu, 15 Nov 2018 22:31:53 GMT

All depends on the data. Some applications will dedupe better than others.

What's your workload(s); SQL, Exchange, VDI, Oracle?

Re: Dedude Ratio

AndreUnterberg — Thu, 15 Nov 2018 22:43:50 GMT

Hi lethaniel, I can report from "the field" that we have deduplication and compresssion ratios between 1,52 to 3,54. It depends on the data. If you have a "normal" VMWare Environment with DC,Exchange, FileServer, SQL, and so on, an Efficiency Ratio of 2:1 is absolutly realistic. If you have Medical Data like PACS it will be unrealistic. Kind regards Andre