Hi,
Has anyone implemented Priority Optimization (QOS) on their VVols?
I'm trying to find out if a single VVSet can have say 2 volumes which both need 500IOPS. So if I set the value Min Goall to 500OIPS, will EACH VV will get 500 or will the 500IOPS be shared between the 2 VVols ?
Same goes for Bandwith.
Thanks!
Priority Optimization
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JasonAntes
- Posts: 17
- Joined: Wed Oct 30, 2013 12:06 pm
Re: Priority Optimization
What InForm are you running? 3.1.3 has more options.
From what I've gathered, all volumes in a QoS group can go up to the limit of the whole. That means if you set your IOPS limit to 500, then all vvols in that group split that 500 IOPS. For instance if you had 4 vvols in that QoS group and 2 were running at 200 IOPS constantly, the other 2 would have 100 IOPS to split. It's obviously a little more dynamic than that but you get the picture.
You can have each vvol in up to 8 vvol sets. I currently have an overall Test and Prod sets which have a high overall limit, and then have several other sets which break it down further by application.
From what I've gathered, all volumes in a QoS group can go up to the limit of the whole. That means if you set your IOPS limit to 500, then all vvols in that group split that 500 IOPS. For instance if you had 4 vvols in that QoS group and 2 were running at 200 IOPS constantly, the other 2 would have 100 IOPS to split. It's obviously a little more dynamic than that but you get the picture.
You can have each vvol in up to 8 vvol sets. I currently have an overall Test and Prod sets which have a high overall limit, and then have several other sets which break it down further by application.
Re: Priority Optimization
As Jason describes above, the QOS caps are per "VVSet" or "VDomain", you can find the whitepaper here:-
http://www8.hp.com/h20195/v2/GetDocumen ... A4-7604ENW
http://www8.hp.com/h20195/v2/GetDocumen ... A4-7604ENW
Re: Priority Optimization
Hi,
Thank you both for your reply. Thats a shame i guess would be nice if all got the same amount as the min/max but that no big deal. The HP support team seem to think they all get the same amount but then again this was first line escalation so may not be as reliable!
Cheers
Thank you both for your reply. Thats a shame i guess would be nice if all got the same amount as the min/max but that no big deal. The HP support team seem to think they all get the same amount but then again this was first line escalation so may not be as reliable!
Cheers
Re: Priority Optimization
Imagine the chaos you could cause if they all got the same amount. 1000 IOps for a volume set with 50 volumes = 50,000 IOps. Much safer to just work out the aggregate IOps for all volumes in the group e.g 1000 IOps in your example.