You simply need to create the iSCSI store as a Seperate LUN from NFS then migrate your NFS Hosted VM's to it.
No procedure as it's a pretty straight forward operation, in your case the TrueNAS would have to have enough unassigned storage for the iSCSI lun. On Fri, Dec 3, 2021 at 1:14 PM David Johnson <[email protected]> wrote: > Hello braintrust, > > My ovirt cluster is prone to hanging when it is put under a high IO load. > In an earlier thread, someone determined that this is consistent across > architectures and infrastructures when NFS is used for the backing > datastore for the cluster. > > I was able to see a huge improvement by switching putting an nVME drive in > as the intent log cache on the NAS. But, alas, that appears to have only > put off the reckoning, and the cluster locked up again when I doubled the > IO workload. > > Prior email chains to this list have established that the hang occurs > because "something" in qemu throws the VM into PAUSE state instead of > IOWAIT state when under load. Other emails I have viewed seem to point at > NFS as the root cause, so a "least cost" suggestion is to migrate from NFS > to iSCSI as backing storage. > > Is there an existing procedure for migrating Ovirt VM storage from NFS to > iSCSI? > > Current architecture: > > Ovirt engine 4.4.4.7-1.el8 on centos 8.x, on bare metal intel desktop > 2 hosts 4.4.4.7-1.el8 on centos 8.x > TrueNAS Core 2020, with shares exposed as NFS > 10 GBit dedicated storage Network > > > Thanks, > > *David Johnson* > > > _______________________________________________ > Users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/[email protected]/message/CNZ7P6GICZMMVBXJ5DONQZSR7NU6G3VW/ >
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