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Hadoop QA commented on HDFS-1783: --------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12531578/HDFS-1783-trunk-v5.patch against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 10 new or modified test files. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 javadoc. The javadoc tool did not generate any warning messages. +1 eclipse:eclipse. The patch built with eclipse:eclipse. -1 findbugs. The patch appears to introduce 1 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 in hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs: org.apache.hadoop.fs.viewfs.TestViewFsTrash +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/2631//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/2631//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2631//console This message is automatically generated. > Ability for HDFS client to write replicas in parallel > ----------------------------------------------------- > > Key: HDFS-1783 > URL: https://issues.apache.org/jira/browse/HDFS-1783 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs client > Reporter: dhruba borthakur > Assignee: Lars Hofhansl > Attachments: HDFS-1783-trunk-v2.patch, HDFS-1783-trunk-v3.patch, > HDFS-1783-trunk-v4.patch, HDFS-1783-trunk-v5.patch, HDFS-1783-trunk.patch > > > The current implementation of HDFS pipelines the writes to the three > replicas. This introduces some latency for realtime latency sensitive > applications. An alternate implementation that allows the client to write all > replicas in parallel gives much better response times to these applications. -- 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