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From "Jean-Daniel Cryans (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5716) Make HBASE-4608 easier to use
Date Wed, 04 Apr 2012 18:49:18 GMT
Make HBASE-4608 easier to use
-----------------------------

                 Key: HBASE-5716
                 URL: https://issues.apache.org/jira/browse/HBASE-5716
             Project: HBase
          Issue Type: Improvement
            Reporter: Jean-Daniel Cryans
             Fix For: 0.96.0, 0.94.1


HBASE-4608 is a nice feature but after playing with it for a while I think the following should
be fixed to make it easier to use by someone who's not a dev:

 - Add some signal that says that the feature is turned on. Right now you can {{jstack | grep
KeyValueCompression}} a couple of times and if you get a hit you definitely know it's on,
but otherwise the random user wouldn't know without going through the jira.
 - Add documentation in the reference guide. At the minimum add {{hbase.regionserver.wal.enablecompression}}
in there with a small description. Better would be to add a section in {{Appendix B}} or something
like that and describe the functionality a bit and who it's useful for. For example, flush
from your brain the knowledge of the patch and read the name of the configuration... now let's
say you have a use case that involves writing easily compressible values. Any normal user
would believe that this is a good tuning parameter for them, but it's just going to waste
CPU cycles.
 - Add some metrics like we have for HFiles where you get a clue about the compression ratio.

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