Yes, JMX exposes compaction time. My cluster has JMX enabled, and I can view certain statistics from remote jconsole.
However, I dont find any reference talking about how to write a Java program to collect a specific statistics, like compaction time available in region server status. Does anyone here have experience in writing low-level code to collect JMX data, instead of using jconsole or other high-level tools... PS: I have found some sample code here<http://hadoop.apache.org/docs/current/api/org/apache/hadoop/metrics/package-summary.html>, yet the API is deprecated. Regards, Yun On Thu, Nov 8, 2012 at 6:43 AM, Jean-Marc Spaggiari <[email protected] > wrote: > Please someone correct me if I'm wrong, but I think there is some > information exposed to JMX which give you the duration (and size) of > the last compaction. > > JM > > 2012/11/8, PG <[email protected]>: > > Hi, thanks for the comments. One thing is,,,, shouldn't web UI comes from > > the hbase API, or can I issue function call to get the progress of > > compaction?. > > Hun > > > > On Nov 8, 2012, at 1:33 AM, ramkrishna vasudevan > > <[email protected]> wrote: > > > >> There is no interface which says that the major compaction is completed. > >> But you can see that major compaction is in progress from the web UI. > >> Sorry if am wrong here. > >> > >> Regards > >> Ram > >> > >> On Thu, Nov 8, 2012 at 11:38 AM, yun peng <[email protected]> > wrote: > >> > >>> Hi, All, > >>> I want to measure the duration of a major compaction in HBase. Since > the > >>> function call majorCompact is asynchronous, I may need to manually > check > >>> when the major compaction is done. Does Hbase (as of version 0.92.4) > >>> provide an interface to determine completion of major compaction? > >>> Thanks. > >>> Yun > >>> > > >
