Critical Description
In hadoop-metrics.properties, GangliaContext is optional metrics context, I think we will use ganglia to monitor hbase cluster generally.
However, I find a serious problem:
RegionServerDynamicMetrics will generate lots of rrd file because we would move region or create/delete table.
Especially if table is created everyday in some applications, there are much more and more rrd files in Gmetad Server. It will make Gmetad Server corrupted.
IMO, MetricsContext should be different between RegionServerMetrics and RegionServerDynamicMetrics