Re: ceph mds operations

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On Tue, Nov 10, 2015 at 11:46 AM, Kenneth Waegeman
<kenneth.waegeman@xxxxxxxx> wrote:
> Hi all,
>
> Is there a way to see what an MDS is actually doing? We are testing metadata
> operations, but in the ceph status output only see about 50 ops/s :  client
> io 90791 kB/s rd, 54 op/s
> Our active ceph-mds is using a lot of cpu and 25GB of memory, so I guess it
> is doing a lot of operations from memory, which are not shown in the output?
> Is there a way to see this more transparent?

Yep, the MDS has lots of performance counters.

ceph daemon mds.<id> perf dump (and the perf schema command for some
descriptions)

John



>
> Thanks!
>
> Kenneth
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