Hadoop has hundreds of configurable parameters. Â And Hadoop admins and developers spend a lot of time tweaking these settings.
I wanted a quick way to dump all the configuration settings of a Hadoop cluster. So I adopted an example from Tom White’s Hadoop book. Once I got the Hadoop Configuration working, I added a utility to dump HBase cluster configuration. Why stop there; Also added a utility for dumping Accumulo configuration 🙂 The project is OPEN SOURCE and hosted in GitHub : https://github.com/sujee/print-hadoop-confi
To get started: 1) clone the project git clone https://github.com/sujee/print-hadoop-config.git
2) compile using maven mvn package
3) edit env.sh to reflect your settings
4) to see hadoop conf, use ./hadoop-conf.sh that is it… Just a little trivia. Testing this with Hadoop v1.2.1 results in 257 parameters! ============
Feedback from HBase mailing list post:
Dump Hadoop config by $ hadoop org.apache.hadoop.conf.Configuration
And dump HBase config by $ hbase org.apache.hadoop.hbase.HBaseConfiguration
(how ever the output isn’t very readable 🙂 )
