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From "Li Pi (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4608) HLog Compression
Date Mon, 07 Nov 2011 10:31:51 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Li Pi updated HBASE-4608:
-------------------------

    Attachment: 4608v1.txt

Heres what I have so far. Things are written, and "should work". I need to rework the test
cases to test this, and put something in the config file to enable/disable. Obviously this
isn't ready for commit at the moment, but I can get those two things done pretty quickly.

Obviously the dictionary is incredibly simple at the moment, I'll come up with something cooler
sooner. Let me know how this looks.
                
> HLog Compression
> ----------------
>
>                 Key: HBASE-4608
>                 URL: https://issues.apache.org/jira/browse/HBASE-4608
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Li Pi
>            Assignee: Li Pi
>         Attachments: 4608v1.txt
>
>
> The current bottleneck to HBase write speed is replicating the WAL appends across different
datanodes. We can speed up this process by compressing the HLog. Current plan involves using
a dictionary to compress table name, region id, cf name, and possibly other bits of repeated
data. Also, HLog format may be changed in other ways to produce a smaller HLog.

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