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https://issues.apache.org/jira/browse/HBASE-4608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185377#comment-13185377
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jirapos...@reviews.apache.org commented on HBASE-4608:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/2740/
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(Updated 2012-01-13 01:34:31.569679)
Review request for hbase, Eli Collins and Todd Lipcon.
Changes
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fixed bug in dictionary causing another test to fail. passes small tests now.
running med tests.
Summary
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HLog compression. Has unit tests and a command line tool for
compressing/decompressing.
This addresses bug HBase-4608.
https://issues.apache.org/jira/browse/HBase-4608
Diffs (updated)
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src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplayCompressed.java
PRE-CREATION
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplay.java
59910bf
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLRUDictionary.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogReader.java
d9cd6de
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
cbef70f
src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALDictionary.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALEdit.java e1117ef
src/main/java/org/apache/hadoop/hbase/regionserver/wal/LRUDictionary.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java 24407af
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java f067221
src/main/java/org/apache/hadoop/hbase/HConstants.java 5120a3c
src/main/java/org/apache/hadoop/hbase/regionserver/wal/CompressedKeyValue.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/CompressionContext.java
PRE-CREATION
src/main/java/org/apache/hadoop/hbase/regionserver/wal/Compressor.java
PRE-CREATION
Diff: https://reviews.apache.org/r/2740/diff
Testing
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Thanks,
Li
> 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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