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Good! By the word, CEPH needs many GB RAM

Hm... Well. May be. But now I use CEPH and its so better, because work well without hard.

When I try to migrate VM -> proxmox copyied qcow2 disk at the same storage with different number. Only checkbox "shared" give me result when I can live migrate VM without copy disk? This option can damage data or make cluster unstable?

What's network hardware?

Tell me, please, what about you network configuration? Have you link aggregation? What's the switch? Cisco? Microtik?

Hi! Good stuff. But I have some questions about it: 1) Why you turn off fence? 2) When NODE lose connections with NETWORK cluster is down (corosync is failed - killed by dlm) and only reboot can alive the node. What do you think about it? 3) Sometimes corosync lost connections to network 4) It...