Operation per second meanining

Operation per second meanining

[Roman Alekseev]

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

Re: Operation per second meanining

[Gregory Farnum]

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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