* Operation per second meanining
@ 2013-06-04 10:26 Roman Alekseev
2013-06-04 16:30 ` Gregory Farnum
0 siblings, 1 reply; 2+ messages in thread
From: Roman Alekseev @ 2013-06-04 10:26 UTC (permalink / raw)
To: ceph-devel@vger.kernel.org
Hello,
Please help me to understand op/s (operation per second) value in 'pgmap
v71520: 3352 pgs: 3352 active+clean; 212 GB data, 429 GB used, 23444 GB
/ 23874 GB avail; 89237KB/s wr, 24op/s' line?
What does "operation" mean?
Thanks
--
Kind regards,
R. Alekseev
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Operation per second meanining
2013-06-04 10:26 Operation per second meanining Roman Alekseev
@ 2013-06-04 16:30 ` Gregory Farnum
0 siblings, 0 replies; 2+ messages in thread
From: Gregory Farnum @ 2013-06-04 16:30 UTC (permalink / raw)
To: Roman Alekseev; +Cc: ceph-devel@vger.kernel.org
On Tue, Jun 4, 2013 at 3:26 AM, Roman Alekseev <rs.alekseev@gmail.com> wrote:
> Hello,
>
> Please help me to understand op/s (operation per second) value in 'pgmap
> v71520: 3352 pgs: 3352 active+clean; 212 GB data, 429 GB used, 23444 GB /
> 23874 GB avail; 89237KB/s wr, 24op/s' line?
> What does "operation" mean?
What it sounds like — the pgmap includes the aggregate number of
read/write/whatever ops done across the cluster which are reported in
its time period, and will derive an average from that to output. This
is distinctly not a precise dynamic assessment, though — think of it
as being an approximate activity gauge, not something you can query
dynamically for instantaneous stats.
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
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