[
https://issues.apache.org/jira/browse/HBASE-4608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13229137#comment-13229137
]
[email protected] commented on HBASE-4608:
------------------------------------------------------
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/4328/#review5929
-----------------------------------------------------------
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
<https://reviews.apache.org/r/4328/#comment12894>
Introducing enum is a good idea.
I would suggest changing this to COMPRESSED_WITH_DICTIONARY or something
similar.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
<https://reviews.apache.org/r/4328/#comment12895>
How about passing compressionContext and type of field we're reading to
Compressor.readCompressed() ?
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogReader.java
<https://reviews.apache.org/r/4328/#comment12891>
Hiding LRUDictionary.class is desirable.
Shall we pass this.getMetadata() to CompressionContext ctor where selection
of compression type is made ?
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
<https://reviews.apache.org/r/4328/#comment12892>
We introduced compression type in Metadata, how about allowing user to
specify compression type using conf ?
Default is dictionary compression.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
<https://reviews.apache.org/r/4328/#comment12893>
Hiding LRUDictionary.class is desirable.
How about passing conf to CompressionContext ctor ?
- Ted
On 2012-03-14 07:34:58, Michael Stack wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/4328/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2012-03-14 07:34:58)
bq.
bq.
bq. Review request for hbase.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. See issue
bq.
bq.
bq. This addresses bug hbase-4608.
bq. https://issues.apache.org/jira/browse/hbase-4608
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. src/main/java/org/apache/hadoop/hbase/HConstants.java 045c6f3
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/CompressionContext.java
PRE-CREATION
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/Compressor.java
PRE-CREATION
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/Dictionary.java
PRE-CREATION
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java b5049b1
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogKey.java
311ea1b
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/KeyValueCompression.java
PRE-CREATION
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/LRUDictionary.java
PRE-CREATION
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogReader.java
ff63a5f
bq.
src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
01ebb5c
bq. src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALEdit.java
d8f317c
bq. src/main/java/org/apache/hadoop/hbase/util/Bytes.java de8e40b
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCompressor.java
PRE-CREATION
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestKeyValueCompression.java
PRE-CREATION
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLRUDictionary.java
PRE-CREATION
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplay.java
a11899c
bq.
src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplayCompressed.java
PRE-CREATION
bq.
bq. Diff: https://reviews.apache.org/r/4328/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq.
bq. Thanks,
bq.
bq. Michael
bq.
bq.
> HLog Compression
> ----------------
>
> Key: HBASE-4608
> URL: https://issues.apache.org/jira/browse/HBASE-4608
> Project: HBase
> Issue Type: New Feature
> Reporter: Li Pi
> Assignee: stack
> Fix For: 0.94.0
>
> Attachments: 4608-v19.txt, 4608-v20.txt, 4608-v22.txt, 4608v1.txt,
> 4608v13.txt, 4608v13.txt, 4608v14.txt, 4608v15.txt, 4608v16.txt, 4608v17.txt,
> 4608v18.txt, 4608v23.txt, 4608v24.txt, 4608v25.txt, 4608v27.txt, 4608v5.txt,
> 4608v6.txt, 4608v7.txt, 4608v8fixed.txt, hbase-4608-v28-delta.txt,
> hbase-4608-v28.txt, hbase-4608-v28.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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
