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Hudson commented on HDFS-2130: ------------------------------ Integrated in Hadoop-Common-trunk-Commit #1237 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/1237/]) HDFS-2130. Switch default checksum to CRC32C. Contributed by Todd Lipcon. todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1196889 Files : * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockMetadataHeader.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FSDatasetInterface.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ReplicaInPipeline.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ReplicaInPipelineInterface.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestAppendDifferentChecksum.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDataTransferProtocol.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestSimulatedFSDataset.java > Switch default checksum to CRC32C > --------------------------------- > > Key: HDFS-2130 > URL: https://issues.apache.org/jira/browse/HDFS-2130 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: hdfs client > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 0.24.0, 0.23.1 > > Attachments: hdfs-2130.txt, hdfs-2130.txt, hdfs-2130.txt > > > Once the other subtasks/parts of HDFS-2080 are complete, CRC32C will be a > much more efficient checksum algorithm than CRC32. Hence we should change the > default checksum to CRC32C. > However, in order to continue to support append against blocks created with > the old checksum, we will need to implement some kind of handshaking in the > write pipeline. -- 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