Re: [ovirt-users] Lowering cluster CPU level : safe?
Le 03/08/2014 21:45, Itamar Heim a écrit : (assuming not relevant, but for next person googling...) Clever attitude. Thanks. live migration of VMs may fail / misbehave in such a case. we do not currently check the original cpu level to compare it during live migration. Strange, because here is what I noticed : - Eventually, I lowered the cluster CPU level from SandyBridge to Westmere - I tried to migrate the VMs that were still running since the sandybridge time. When destination choosing the sandybridge hosts, it worked. When choosing the westmere hosts, it failed. - I had to shutdown the VMs, then bring them back. Since then, I can migrate them anywhere. To me this looks perfectly clear and sound - this deals with available CPU features (and instructions passthrough I guess). -- Nicolas Ecarnot ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Lowering cluster CPU level : safe?
On 06/17/2014 01:07 PM, Nicolas Ecarnot wrote: Hi, I'm trying to add some Westmere hosts into a Sandybridge cluster, and of course, they get refused : Host x moved to Non-Operational state as host does not meet the cluster's minimum CPU level. Missing CPU features : model_SandyBridge I tried to lower the cluster level but I get this warning : Change Cluster CPU level There are running VMs. Lowering the Cluster CPU level might prevent migration of these VMs to some of the Hosts in the Cluster. Are you sure you want to continue? As a frightened chicken, I clicked Cancel and turned to you : how safe is it to lower the CPU level? I understand some instructions will be missing, and maybe performance will change, but we don't have heavy CPU usage yet, so this may not be a big issue. I was wondering what will happen to my existing VMs? Will I have to modify some setup? What may prevent migration between westmere and sandybridge hosts? Regards, (assuming not relevant, but for next person googling...) live migration of VMs may fail / misbehave in such a case. we do not currently check the original cpu level to compare it during live migration. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[ovirt-users] Lowering cluster CPU level : safe?
Hi, I'm trying to add some Westmere hosts into a Sandybridge cluster, and of course, they get refused : Host x moved to Non-Operational state as host does not meet the cluster's minimum CPU level. Missing CPU features : model_SandyBridge I tried to lower the cluster level but I get this warning : Change Cluster CPU level There are running VMs. Lowering the Cluster CPU level might prevent migration of these VMs to some of the Hosts in the Cluster. Are you sure you want to continue? As a frightened chicken, I clicked Cancel and turned to you : how safe is it to lower the CPU level? I understand some instructions will be missing, and maybe performance will change, but we don't have heavy CPU usage yet, so this may not be a big issue. I was wondering what will happen to my existing VMs? Will I have to modify some setup? What may prevent migration between westmere and sandybridge hosts? Regards, -- Nicolas Ecarnot ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
