AlexZzz blog

linux administration blog draft

Ceph snaps the bad and cephstat

The very first post must contain something new. So, it introduces the cephstat utility that can help in finding out ceph-osd bottlenecks. cephstat is very simple: ~# ./cephstat -d osd.64 osd.75 With -d option it shows all available osd daemons through finding all admin sockets. Only option it needs to start reporting statistics - daemon name, ex: cephstat osd.64. See -h for help. Ceph debug story Once we’ve looked at ceph cluster statistics and we’ve noticed that some osds had high latency.