How to monitor major compaction of hbase

Question

I want to monitor major compaction of the hbase. For each table I would like to know

• when it starts (by hbase or by user)
• when it finished

How can I monitor this?

• via JMX ?
• via UI ?

In general what additional parameters should I monitor to detect that the major compaction is needed?

Answer 1

I know the answer is a bit late, but instead of manually looking at the Log-Files you could also give Hannibal a try. It is a open-source tool that provides History-Graphs for each region. The graphs show when compactions happened and how long they took.

https://github.com/sentric/hannibal/