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I had gave a try for SCSI and iothread, SCSI did provide better performance than virtio. But both did not resolve the 15 seconds freeze issue. I am wondering if there is any settings in ceph for timeout settings which may help on it.

Please find the VM config on below, currently is 3 nodes cluster and we may expand our cluster to 5 nodes in further. just afraid will face the same after expanded the cluster... ceph-dcssd is system OS disk, it is Ceph (3/2) with using Samsung SM863a 240G SSD root@PVE01:~# qm config 100...

Hi Alwin, I think it may reduce the freeze of write for 2-3 seconds only, however the read is still freeze when the node initialize reboot...

Thank you for your reply, so 3/2 is recommended even for small setup? Would 2/2 provides better performance? I will try this later. But it means the freeze time should be lesser if the rebooting node is not assigned as "Primary OSD"?

3 monitors and 3 managers Total 7 OSD, but sedated as two pool with crush rules, size has configured to 2/1 Node 1: 2 OSD (1 in affected pool) Node 2: 3 OSD (2 in affected pool) Node 3: 3 OSD (2 in affected pool) *affected pool means the pool that stored testing VM

Hi, I have built a Hyper-coveraged 3 nodes cluster with Proxmox and using ceph for shared storage. However I observed VM IO will hang for about 15 seconds when one Ceph node performing graceful reboot. I had already tried the reboot procedure from redhat, configured noout and norebalance, but no...

I have same issue too, just testing UEFI boot for new VM template and observed this issue, I am using version 5.3-8 tho.