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Hadoop QA commented on HDFS-8873: --------------------------------- \\ \\ | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:red}-1{color} | pre-patch | 15m 56s | Findbugs (version ) appears to be broken on trunk. | | {color:green}+1{color} | @author | 0m 0s | The patch does not contain any @author tags. | | {color:green}+1{color} | tests included | 0m 0s | The patch appears to include 1 new or modified test files. | | {color:green}+1{color} | javac | 8m 1s | There were no new javac warning messages. | | {color:green}+1{color} | javadoc | 10m 1s | There were no new javadoc warning messages. | | {color:green}+1{color} | release audit | 0m 22s | The applied patch does not increase the total number of release audit warnings. | | {color:green}+1{color} | checkstyle | 0m 34s | There were no new checkstyle issues. | | {color:red}-1{color} | whitespace | 0m 7s | The patch has 1 line(s) that end in whitespace. Use git apply --whitespace=fix. | | {color:green}+1{color} | install | 1m 36s | mvn install still works. | | {color:green}+1{color} | eclipse:eclipse | 0m 34s | The patch built with eclipse:eclipse. | | {color:green}+1{color} | findbugs | 2m 26s | The patch does not introduce any new Findbugs (version 3.0.0) warnings. | | {color:green}+1{color} | native | 3m 11s | Pre-build of native portion | | {color:red}-1{color} | hdfs tests | 191m 53s | Tests failed in hadoop-hdfs. | | | | 234m 46s | | \\ \\ || Reason || Tests || | Failed unit tests | hadoop.tools.TestJMXGet | | | hadoop.hdfs.server.blockmanagement.TestBlockManager | | | hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistLockedMemory | | | hadoop.hdfs.shortcircuit.TestShortCircuitCache | | | hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistReplicaPlacement | | | hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyWriter | \\ \\ || Subsystem || Report/Notes || | Patch URL | http://issues.apache.org/jira/secure/attachment/12755501/HDFS-8873.001.patch | | Optional Tests | javadoc javac unit findbugs checkstyle | | git revision | trunk / 9538af0 | | whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/12406/artifact/patchprocess/whitespace.txt | | hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12406/artifact/patchprocess/testrun_hadoop-hdfs.txt | | Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12406/testReport/ | | Java | 1.7.0_55 | | uname | Linux asf901.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux | | Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/12406/console | This message was automatically generated. > throttle directoryScanner > ------------------------- > > Key: HDFS-8873 > URL: https://issues.apache.org/jira/browse/HDFS-8873 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode > Affects Versions: 2.7.1 > Reporter: Nathan Roberts > Assignee: Daniel Templeton > Attachments: HDFS-8873.001.patch > > > The new 2-level directory layout can make directory scans expensive in terms > of disk seeks (see HDFS-8791) for details. > It would be good if the directoryScanner() had a configurable duty cycle that > would reduce its impact on disk performance (much like the approach in > HDFS-8617). > Without such a throttle, disks can go 100% busy for many minutes at a time > (assuming the common case of all inodes in cache but no directory blocks > cached, 64K seeks are required for full directory listing which translates to > 655 seconds) -- This message was sent by Atlassian JIRA (v6.3.4#6332)