Database Reference
In-Depth Information
Here are some sample graphs from Ganglia (these are Wikimedia statistics,
for example):
These graphs show cluster-wide resource utilization.
OpenTSDB
OpenTSDB is a scalable time series database, which we mentioned in
Chapter 5
,
Time Series Data
. It can collect and visualize metrics on a large scale. OpenTSDB uses
collectors
, light-weight agents that send metrics to the open TSDB server to collect
metrics, and there is a collector library that can collect metrics from HBase.
You can see all the collectors at
http://opentsdb.net/docs/
An interesting factoid is that OpenTSDB is built on Hadoop/HBase.
Collecting metrics via the JMX interface
HBase exposes a lot of metrics via JMX.
This page can be accessed from the web dashboard at
http://<hbase
master>:60010/jmx
.
For example, for a HBase instance that is running locally, it will be
http://localhost:60010/jmx
.
