[ceph-users] Re: PG is stuck in repmapped and degraded

Hi,all we use openstack + ceph(hammer) in my production

Hammer is soooooo 2015.

There are 22 osds on a host and 11 osds share one ssd for osd journal.

I can’t imagine a scenario in which this strategy makes sense, the documentation and books are quite clear on why this is a bad idea. Assuming that your OSDs are HDD and the journal devices are SATA SSD, the journals are going to be a bottleneck, and you’re going to wear through them quickly. If you have a read-mostly workload, colocating them would be safer. I also suspect that something is amiss with your CRUSH topology that is preventing recovery, and/or you actually have multiple overlapping failures.