[ovirt-users] Re: mdadm vs. JBOD

Thank you for the confirmation Strahil! As our current environment is more or less the same (except the Hardware RAID, which is not possible with NVMe disks), we planned to use Gluster. I guess we will proceed as we originally planned as we are satisfied with the performance.

On 3/11/22 07:08, Strahil Nikolov via Users wrote: Red Hat Gluster Storage is discontinued, but the Gluster (upstream) is pretty active and as Sandro Bonazzola (RH) confirmed -> there are no plans to remove support for Gluster. I think it's still a good choice, especially if you don't have SAN/ Higly-Available NFS. Also, storage migration is transparent for the VMs, so you can add SAN on a later stage and move all VMs from Gluster to SAN without disruption* . Keep in mind that Gluster is a tier2 storage and if you really need a lot of IOPS, CEPH might be suitable. Best Regards, Strahil Nikolov *: Note that this is valid if the FUSE client is used. Other oVirt users report huge performance increase when using libgfapi interface, but it has drawbacks like storage migration can happen only when you switch off libgfapi, power off the VM (on a scheduled basis), power on the VM, live migrate the VM to other storage type, enable libgfapi again for the rest of the VMs. Thanks to Nikolov and Strahil for the valuable input! I was off for a few weeks, so I would like to apologize if I'm potentially reviving a zombie thread. I am a bit confused about where to go with this environment after the discontinuation of the hyperconverged setup. What alternative options are there for us? Or do you think going the Gluster way would still be advisable, even though it seems as it is being discontinued over time? Thanks for any input on this! Best regards, Jonas On 1/22/22 14:31, Strahil Nikolov via Users wrote: Using the wizzard is utilizing the Gluster Andible roles. I would highly recommend using it, unless you know what you are doing (for example storage alignment when using Hardware raid). Keep in mind that the DHT xlator (the logic in distributed volumes) is shard aware, so your shards are spread between subvolumes and additional performance can be gained.So using replicated-distributed volumes have their benefits. If you decide to avoid the software raid, use only replica3 volumes as with SSDs/NVMEs usually the failures are not physical, but logical (maximum writes reached -> predictive failure -> total failure). Also, consider mounting via noatime/relatime and context="system_u:object_r:glusterd_brick_t:s0" for your gluster bricks. Best Regards, Strahil Nikolov On Fri, Jan 21, 2022 at 11:00, Gilboa Davara <gilboad(a)gmail.com&gt; <gilboad(a)gmail.com&gt; wrote: _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)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/U2ZEWLRF5D6... _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)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/26AHNDSOJSI... _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)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/JFFS2T25TII...