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https://issues.apache.org/jira/browse/HBASE-4608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13183495#comment-13183495
]
Zhihong Yu commented on HBASE-4608:
-----------------------------------
I got the following on my MacBook for 4608v9.txt:
{code}
testReplayEditsWrittenViaHRegion(org.apache.hadoop.hbase.regionserver.wal.TestWALReplayCompressed)
Time elapsed: 2.009 sec <<< FAILURE!
java.lang.AssertionError
at org.junit.Assert.fail(Assert.java:92)
at org.junit.Assert.assertTrue(Assert.java:43)
at org.junit.Assert.assertTrue(Assert.java:54)
at
org.apache.hadoop.hbase.regionserver.wal.TestWALReplay.testReplayEditsWrittenViaHRegion(TestWALReplay.java:289)
{code}
> 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, 4608v5.txt, 4608v6.txt, 4608v7.txt,
> 4608v8fixed.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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