[ceph-users] Ceph-mgr summarize recovery counters

Gregory Farnum gfarnum at redhat.com
Wed Oct 4 11:14:05 PDT 2017


On Wed, Oct 4, 2017 at 9:14 AM, Benjeman Meekhof <bmeekhof at umich.edu> wrote:
> Wondering if anyone can tell me how to summarize recovery
> bytes/ops/objects from counters available in the ceph-mgr python
> interface?  To put another way, how does the ceph -s command put
> together that infomation and can I access that information from a
> counter queryable by the ceph-mgr python module api?
>
> I want info like the 'recovery' part of the status output.  I have a
> ceph-mgr module that feeds influxdb but I'm not sure what counters
> from ceph-mgr to summarize to create this information.  OSD have
> available a recovery_ops counter which is not quite the same.  Maybe
> the various 'subop_..' counters encompass recovery ops?  It's not
> clear to me but I'm hoping it is obvious to someone more familiar with
> the internals.
>
> io:
>     client:   2034 B/s wr, 0 op/s rd, 0 op/s wr
>     recovery: 1173 MB/s, 8 keys/s, 682 objects/s


You'll need to run queries against the PGMap. I'm not sure how that
works in the python interfaces but I'm led to believe it's possible.
Documentation is probably all in the PGMap.h header; you can look at
functions like the "recovery_rate_summary" to see what they're doing.
-Greg


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