Ok, I have tested with iothread, and I have problem , migration crashing or qemu process crashing.
Also with only 1disk.
So it seem that qemu is buggy currently, for drive-mirror + livemigration at the same time when iothread is enabled.
yes, it should work.
maybe a little bit overkill.
you can give a try at
or wait for next ceph release (mimic), which should have integrated dashboards with management (create/delete/update).
Hi, I'm currently working on implementation on vxlan + bgp evpn. This should give us something like vmware nsx. (with anycast gateway on proxmox host). This will work with linux bridge.
I'll try to send patches next month.
if you enable cache=writeback on vm, it'll enable rbd_cache=true.
ceph have a feature by default
rbd cache writethrough until flush = true.
That mean that it's waiting to receive a first fsync, before really enable writeback. So you are safe to enable writeback.
Writeback is helping for...
The problem is coming from network latency + ceph latency. If you copy 1 file, sequentially and with small blocks, it's iodepth=1. (same with dd command for example).
For each block, you'll have your network latency (0,1ms for example), you'll be able to do 10000 iops.
if you do it with 4k...