I like to setup CEPH storage on a 3 node Proxmox cluster in the future. This is a HomeLab for my hobby stuff and learning. I want to use 1 nvme ssd per node. Only I'm not sure how big nvme ssd I should use. My first thoughts are a 4TB one. Is this big enough?
How big should my NVMe SSD be
- Thread starter HomeLabNerd
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https://www.florian.ca/ceph-calculator/
Always calculate for worst case, so 12/3=4TB storage space for VMs
"Replication" is a term used for ZFS.
For Ceph you have (by default) three OSDs (Object Storage Daemon, usually = one disk) storing a copy of each block. Each one being on a different host.
There are some more aspects to consider: https://forum.proxmox.com/threads/fabu-can-i-use-ceph-in-a-_very_-small-cluster.159671/
Good article!
I think I have to ditch the CEPH idea. The most important thing to me is that I can quickly migrate vm's from one node to another node for maintenance. I guess I have to look into the replication feature?
Good article!
I think I have to ditch the CEPH idea. The most important thing to me is that I can quickly migrate vm's from one node to another node for maintenance. I guess I have to look into the replication feature?
That's what I do
ZFS replication works fine for me. But you need to accept data loss of data written to the original (virtual) disk after the last successful replication. In some businesses this is a hard show stopper. In some (my) Homelab I am absolutely fine with this - and most of my VMs are replicated only every few hours.