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https://www.modulesgarden.com/products/whmcs/proxmox-vps

Looks like yes.

You can migrate your VM (online) to other nodes before shutdown.

Proxmox doesnt recommend SD/USB flash drive installation. Pci SSD will be good.

This configure how many percent difference tolareted beetwen OSD-s. We using the default 5%, with 1TB HDD.

@janos: No raid card as CEPH is proposed only to be configured with HBA Controllers. If you not using HP HBA (or RAID card in HBA mode), the LED indicator will not working, and the mentioned tools also can not detect HW issues.

Hi, What kind of Proliant server do you have and what raid card?

iSCSI is a block storage, and for storing backup, you can use only file-level storage, NFS or CIFS/Samba for example: https://pve.proxmox.com/wiki/Storage#_storage_types

Hi, We have vmware cluster, and this technology (at least with vmware) working well over 10GBit or 1 GBit (optical) network. Yes, offcourse, 40gbit network, or 100gbit will be better, but better equipment cause only better performance, its not a requirements.

Check this: https://archive.fosdem.org/2018/schedule/event/backup_ceph_at_scale/

Hi, Yes, we do a full rbd export every month to a server with large storage.

Or as an alternatives you can save CEPH rbd images directly from ceph cluster to your backup storage. You can find many scripts for this orpuse, for example: https://github.com/magusnebula/ceph_backup_script

Not the 10GBit matter, the media matter. 10 or 1 GBit with SFP over optical cable have much lesser latency than copper based link even if it that a 10gbit link. (not because of the media, the difference is beetwen how SFP and normal RJ45 interface working, SFP DAC cable also better than regular...

Hello, And is mimic supported in external CEPH cluster? So, proxmox can use mimic cluster without incompatibility, or issue?

Please stop all VM, and try to restart all OSD. First, this will eliminate stuck requests.

What is the output of ceph health detail command?

Hi, You can speed up recovery, but your normal IO will be slow after that. IF you want faster recover, increase the number of recovery processes: ceph tell 'osd.*' injectargs '--osd-max-backfills 16' ceph tell 'osd.*' injectargs '--osd-recovery-max-active 4'

Boot from a CentOS installer CD or DVD in rescue mode, and you need to regenerate initramfs.

Hi, do you have LXC vm on the same node? I experiance similar when i want to start a KVM vm on a node where there is LXC vms.

Now i updated one node to the latest version, i tried to migrate from older node to the upgraded, and i got the same error. But i not see the reason, or any solution or even a workaround.