Re: how to monitor journal utilization

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On Wed, 20 Jun 2012, Travis Rhoden wrote:
> Is there a way I can monitor the utilization of the OSD journal?  I
> would like to know if data is coming in fast enough to fill the
> journal, and thus slow down all the subsequent writes.
> 
> Once the journal is full, that becomes the bottleneck for writes, no?
> (assuming that writes to the journal are faster than the OSD -- such
> as with tmpfs or an SSD.  I'm using tmpfs).

Not yet.  It should be instrumented with PerfCounters similar to the other 
components, but that hasn't happened yet.  Opening

	http://tracker.newdream.net/issues/2619

sage
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