On Fri, 16 Jan 2015, Gregory Farnum wrote:
> On Fri, Jan 16, 2015 at 11:28 AM, Lipeng Wan <[email protected]> wrote:
> > Dear all,
> >
> > Does Ceph provide a way to collect object-level I/O access traces?
> > Specifically, can we collect the traces to record how many times each
> > object has been accessed (read, write, etc.) during a fixed period of
> > time?
>
> I don't think we have any programmatic access, but depending on what
> you need it for you could enable messenger logging (or filestore
> logging, depending on what exactly you want) and count the references
> there.
There are new librados lttng tracepoints queued up for hammer... see
https://github.com/ceph/ceph/blob/master/src/tracing/librados.tp
for the tracepoints.
sage
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