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Hadoop QA commented on HBASE-4608: ---------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12518416/4608v30.txt against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 11 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. -1 findbugs. The patch appears to introduce 161 new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. -1 core tests. The patch failed these unit tests: org.apache.hadoop.hbase.client.TestMetaScanner Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/1191//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/1191//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/1191//console This message is automatically generated. > 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, 4608v29.txt, > 4608v30.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