Planet Ceph

Aggregated news from external sources

December 15, 2014

Ceph: Cache Tier Statistics

{% img center http://sebastien-han.fr/images/ceph-cache-statistics.jpg Ceph: Cache Tier Statistics %}

Quick tip on how to retrieve cache statistics from the a cache pool.

Simply use the admin socket:

“`bash
$ sudo ceph daemon osd.{id} perf dump

 "tier_promote": 1425,
 "tier_flush": 0,
 "tier_flush_fail": 0,
 "tier_try_flush": 216,
 "tier_try_flush_fail": 21,
 "tier_evict": 1413,
 "tier_whiteout": 201,
 "tier_dirty": 671,
 "tier_clean": 216,
 "tier_delay": 16,


“`

Careers