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-bounces@xxxxxxxxxxxxxx] On Behalf Of Jean-Charles Lopez
Sent: 09 November 2014 01:43
To: Nick Fisk
Cc: ceph-users@xxxxxxxxxxxxxx
Subject: Re: 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 <nick@xxxxxxxxxx> 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
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
