On Thu, Jan 20, 2022 at 8:52 AM <jo...@rabe.ch> wrote: > Hi all, > > Feel free to give your personal opinion whether software RAID makes any > sense at all with oVirt Node or what your architecture would be given the > mentioned hardware (3 servers, 6 800GB NVME disks, 18 7.68TB NVME disks). > > Thanks a lot for any feedback, > Jonas >
Hello, I somehow missed your original email. While I don't have a comparable setup (We usually opt for mixed SSD HDD setups with fast VMs running on SSD bached gluster volumes and large-storage VMs using HDD backed gluster volume), I can offer some insight. 1. Performance wise, using software RAID10 on the NVME drives will give you great performance, while reducing the chance of a double drop. 2. Avoid using RAID5/50/6/60 as the write amplification will eat up your read-intensive NVMEs life span in a couple of months. 3, Use a fast network back-end. A good high-end server with hardware RAID HDD can easily saturate a 10GbR Linux @peak load. 4. Use arbiter volumes, split the load between the nodes to reduce the write amplifications. (N1: brick, brick, arbiter. N2: brick, arbiter, brick. N3: arbiter, brick, brick). 5. In general I usually avoid using the wizard, manually creating the gluster volumes before I begin the deployment. - Gilboa > _______________________________________________ > Users mailing list -- users@ovirt.org > To unsubscribe send an email to users-le...@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/ZZ5VDBPHTEVGATFRRQDEWIUFTBWK6TWN/ >
_______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-le...@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/MUNFLE23LVLBURNCP7EXESLWLJQZM3JL/
