Commits on Nov 29, 2016

1. systemd/ceph-disk: reduce ceph-disk flock contention …

   "ceph-disk trigger" invocation is currently performed in a mutually
   exclusive fashion, with each call first taking an flock on the path
   /var/lock/ceph-disk. On systems with a lot of osds, this leads to a
   large amount of lock contention during boot-up, and can cause some
   service instances to trip the 120 second timeout.
   
   Take an flock on a device specific path instead of /var/lock/ceph-disk,
   so that concurrent "ceph-disk trigger" invocations are permitted for
   independent osds. This greatly reduces lock contention and consequently
   the chance of service timeout. Per-device concurrency restrictions
   required for http://tracker.ceph.com/issues/13160 are maintained.
   
   Fixes: http://tracker.ceph.com/issues/18060
   
   Signed-off-by: David Disseldorp <ddiss@suse.de>
   (cherry picked from commit 8a62cbc)

   

   ddiss committed Nov 29, 2016
   Copy the full SHA

   0ab5b7a View commit details

   Browse the repository at this point in the history