Unsolved
This post is more than 5 years old
19 Posts
0
1373
October 10th, 2014 11:00
VNX2 Block Level Dedupe and VMware?
I'm curious if anyone is successfully running block-level dedupe with VMware workloads?
If people are leveraging dedupe I'd be curious how much efficiency they're seeing.
We're getting ready to upgrade from the VNX-1 platform to the VNX-2 platform and we were hoping to implement block dedupe.
docu42660_VNX-Unified-Best-Practices-for-Performance-Applied-Best-Practices-Guide states on p26:
No Events found!
kelleg
6 Operator
•
4.5K Posts
0
October 13th, 2014 11:00
I'd recommend reviewing the VNX Block Deduplication White Paper
https://support.emc.com/docu48711_White-Paper:-EMC-VNX-DEDUPLICATION-AND-COMPRESSION-VNX5200,-VNX5400,-VNX5600,-VNX5800,-VNX7600,-and-VNX8000.pdf
glen
brettesinclair
2 Intern
•
715 Posts
0
October 13th, 2014 23:00
I have not enabled it on any of our VNX2 arrays as yet, erring on the side of caution
Noted that in the most recent Uptime bulletin there is mention of an upcoming R33.074 block release with many dedup
improvements;
" Contains 25 fixes related to deduplication. Approximately 13 of those fixes address performance, and the remaining 12
resolve functional issues that may in the worst cases cause storage processor bugchecks or result in LUNs being taken offline. While these represent the majority of known deduplication issues, there is still a nuber of known deduplication
issues scheduled to be resolved in the next release on VNX for Block OE. EMC recommends customers using the deduplication features upgrade code to at least this R33.074 release"
I'll wait for that release, eval and then selectively test some non-critical/dev LUNs
sk_
1 Rookie
•
104 Posts
0
October 13th, 2014 23:00
Yes, we are running dedup with VMware.
Space savings are good, but dedup processing is rather slow and creates significant amounts of extra I/O to the disks. That overview picture is good, just pick the workloads that meet the criteria.
-sk
dynamox
11 Legend
•
20.4K Posts
•
87.4K Points
0
October 14th, 2014 06:00
i don't know how other folks feel but forcing deduplciated LUNs ownership to one SP is a no-go for me, unless i had multiple pool why would i intentionally move all my workload to one SP.
sk_
1 Rookie
•
104 Posts
0
October 14th, 2014 07:00
But you don't (atleast you shouldn't) enable deduplication on all LUNs. Enable it only on those LUNs that meet the criteria presented on the picture earlier.
All the other non-deduplicated LUNs you can place on the other SP, that will balance the workload without having multiple pools.
-sk
dynamox
11 Legend
•
20.4K Posts
•
87.4K Points
0
October 14th, 2014 07:00
i have many different workloads on my VNX, workloads that vary from day to day depending on what the business units are doing that day or that quoter. With thousands of LUNs on 11 VNX arrays i am not going to manually balance LUNs between SPs. VNX Dedupe is still in its infancy, i will wait when it's more mature.