topic Re: Stretched Cluster with compute nodes in HPE SimpliVity

Stretched Cluster with compute nodes

l_lang — Mon, 25 Jul 2022 03:51:43 GMT

Hi,

we recently expanded our existing federation. Now it consists of 6 hosts evenly distributed between two racks. There are now also 6 compute nodes so the final situation consists of 3 OVCs and 3 compute nodes per rack in a 1:1 mapping. Our idea now was to create a stretched cluster so the active and passive copies are distributed between the racks. Since svt-zone-assign allows only OVC Hosts, our question now is, how IWO reacts to this. The best situation would be that the VMs run inside their zone to prevent additional hops over the switches. We did not find any documentation about this. Has someone experience with this setup?

thanks

Query: Stretched Cluster with compute nodes

support_s — Thu, 21 Jul 2022 08:45:32 GMT

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Re: Stretched Cluster with compute nodes

Mahesh202 — Fri, 22 Jul 2022 15:19:57 GMT

Hi l_lang

Hope you are doing well.

IWO (Intelligent Workload Optimizer) only considers OVC nodes, not compute nodes. I assume that your compute nodes are running VMs where the data is located in a SimpliVity datastore and that is fine. In a stretched cluster environment, as long as you make sure that the copies are balanced to the other zone, then you would be fine. You can check that DRS and the affinity rules are properly configured.

Hope this helps.!!

Regards
Mahesh

Re: Stretched Cluster with compute nodes

l_lang — Wed, 27 Jul 2022 12:02:47 GMT

Hi Mahesh,

I will make some tests about this to look how IWO reacts.

Thanks

Re: Stretched Cluster with compute nodes

Mahesh202 — Wed, 27 Jul 2022 14:22:04 GMT

Hi l_lang

Sure, Please do get back to us for any further queries.

happy to help.!!

Regards
Mahesh