Gluster storage and TRIM VDO
Hello everyone. I have a Gluster distributed replication cluster deployed. The cluster - store for ovirt. For bricks - VDO over a raw disk. When discarding via 'fstrim -av' the storage hangs for a few seconds and the connection is lost. Does anyone know the best practices for using TRIM with VDO in the context of ovirt? ovirt - v4.4.10 gluster - v8.6
This is quite odd. Is your raw disks responsive during the fstrim ?What happens if you trigger it more often ? What disks do you use ? Best Regards,Strahil Nikolov On Tue, Mar 29, 2022 at 10:06, Oleh Horbachov<gorbyo@gmail.com> wrote: Hello everyone. I have a Gluster distributed replication cluster deployed. The cluster - store for ovirt. For bricks - VDO over a raw disk. When discarding via 'fstrim -av' the storage hangs for a few seconds and the connection is lost. Does anyone know the best practices for using TRIM with VDO in the context of ovirt? ovirt - v4.4.10 gluster - v8.6 _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org 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/users@ovirt.org/message/UCTN2ZIG3EDVUU...
Hello. The issue is at same time difficult and easy to reproduce. Easy because I can reproduce 1 time from 3-4 run Difficult because I cant to catch start and stop the issue Answers to your questions 1. In general disks responsive during the fstrim 2. I run trigger every week but ih different day of week for each storage 3. I use nvme disks. I tried to do reproduce the issue manually and found following 1. Affected only for one host of storage cluster (i think because main mount point) 2. In ovirt events found "Host ovirt-host-03 cannot access the Storage Domain(s) glusterfs-data attached to the Data Center Computing. Setting Host state to Non-Operational." and after that event oVirt started migration from host-03 I think the issue is VDSM In additional found at host ovirt-host-03 in vdsm.log few errors at time during fstrim like "ERROR (monitor/2ac7658) [storage.Monitor] Error checking domain 2ac76580-2182-470d-b886-d3d2e28d05b3 (monitor:453)" 2ac... - uuid gluster domain I have 6 hosts in cluster with same install and affected only one
I have 6 hosts in oVirt cluster with same install and affected only one Best regards, Oleh Horbachov
participants (2)
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Oleh Horbachov -
Strahil Nikolov