Hi Jean-Charles,
Thanks for your response, I have found the following using "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,
I'm guessing the tier_promote should increase every time there is a cache miss?
If this is the case then I simply need to add this value from every OSD and
divide by total reads to work out the percentage hit rate.
Nick
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Jean-Charles Lopez
Sent: 09 November 2014 01:43
To: Nick Fisk
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] Cache Tier Statistics
Hi Nick
If my brain doesn't fail me you can try
ceph daemon osd.{id} perf dump
ceph report (not 100% sure if cache stats are in
Rgds
JC
On Saturday, November 8, 2014, Nick Fisk <n...@fisk.me.uk> wrote:
Hi,
Does anyone know if there any statistics available specific to the cache tier
functionality, I’m thinking along the lines of cache hit ratios? Or should I be
pulling out the Read statistics for backing+cache pools and assuming that if a
read happens from the backing pool it was a miss and then calculating it from
that?
Thanks,
Nick
--
Sent while moving
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