On 09/04/2010, at 9:23 PM, Gary Helmling wrote:

> Hi Paul,
> 
> For the master process, you should see 2 MBeans registered (assuming
> distributed setup with default ports):
> 
> hadoop:name=MasterStatistics,service=Master
> hadoop:name=RPCStatistics-60000,service=HBase
> 
> The first is master-specific metrics (just cluster request count I think?).
> The second is a common RPCStatistics MBean for the master's RPC calls.  The
> RPCStatistics MBean will include whatever port is used in the name.
> 
> For a regionserver, you should see:
> 
> hadoop:name=RegionServerStatistics,service=RegionServer
> hadoop:name=RPCStatistics-60020,service=HBase
> 

ok, well under my local simple testing (sort of straight out of the box 
unpacking, not distributed), the RegionServer does _not_ export that 
RegionServerStatistics which is interesting.  If it did, that would be enough 
to differentiate it.  Right now, in simple mode, the RS only exports the 
RPCStatistics. (this is for hbase-0.20.3)

Let me dig further, thanks.

thanks,

Paul


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