Ceph: Cache Tier Statistics [feedly]

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Ceph: Cache Tier Statistics
// Ceph

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,  

... ```

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