Live replication setup

[tomas12343]

I am trying to setup a 2 node system, for a live replication situation. What I need is just to live-replicate the vm (have a last minute backup) and if the main vm fails, start the backup manually. We can even afford to lose 15 minutes of work, but no more. I tried using ZFS, but the system was extremely slow, I am thinking of using CEPH.

The 2 nodes don't have similar specs (they are different pc's). I can use a 3rd pc (just for quorum-if needed), with lower specs then the first 2, but I just need a real time-backup solution, not a failover one.

Can you please help with any recommendations?

 

[LnxBil]

CEPH is not for replication in the sense of the ZFS replication setup. CEPH is a shared storage, so that you don't need to replicate the VM, the storage itself is already replicated. It is for a real cluster setup in the sense that in a 3 node cluster, one whole node can fail and the you just need to start the VM on the other side with a crash consistent filesystem. Yet, I assume if you ZFS is slow, you will not have a lot of fun with CEPH either on the same hardware. What is your hardware?

 

[tomas12343]

CEPH is not for replication in the sense of the ZFS replication setup. CEPH is a shared storage, so that you don't need to replicate the VM, the storage itself is already replicated. It is for a real cluster setup in the sense that in a 3 node cluster, one whole node can fail and the you just need to start the VM on the other side with a crash consistent filesystem. Yet, I assume if you ZFS is slow, you will not have a lot of fun with CEPH either on the same hardware. What is your hardware?

Thank you for your answer! I guess the solution with ZFS volume on both nodes and replication is the only one. Already implementing it.