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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8873) throttle directoryScanner
Date Wed, 23 Sep 2015 19:15:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905062#comment-14905062
] 

Hadoop QA commented on HDFS-8873:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  18m 15s | Pre-patch trunk compilation is healthy. |
| {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 |   7m 58s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 15s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 24s | The applied patch does not increase
the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 24s | The applied patch generated  8 new checkstyle
issues (total was 442, now 443). |
| {color:red}-1{color} | whitespace |   0m  3s | The patch has 3  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   1m 26s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 36s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   2m 31s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 16s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 138m 33s | Tests failed in hadoop-hdfs. |
| | | 184m 47s | |
\\
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestDFSRename |
|   | hadoop.hdfs.TestDatanodeConfig |
|   | hadoop.hdfs.TestBlockReaderFactory |
|   | hadoop.hdfs.server.namenode.ha.TestDFSUpgradeWithHA |
|   | hadoop.hdfs.TestDFSClientRetries |
|   | hadoop.hdfs.TestFileCreationDelete |
|   | hadoop.hdfs.TestSnapshotCommands |
|   | hadoop.hdfs.TestFileConcurrentReader |
|   | hadoop.hdfs.TestFileAppend2 |
|   | hadoop.hdfs.tools.TestDFSAdmin |
|   | hadoop.hdfs.TestBlockStoragePolicy |
|   | hadoop.hdfs.TestLeaseRecovery |
|   | hadoop.hdfs.TestClientProtocolForPipelineRecovery |
|   | hadoop.hdfs.tools.TestDelegationTokenFetcher |
|   | hadoop.tracing.TestTraceAdmin |
|   | hadoop.hdfs.TestWriteConfigurationToDFS |
|   | hadoop.hdfs.tools.TestStoragePolicyCommands |
|   | hadoop.hdfs.TestReplication |
|   | hadoop.hdfs.TestPipelines |
|   | hadoop.hdfs.tools.TestGetGroups |
|   | hadoop.hdfs.TestParallelShortCircuitRead |
|   | hadoop.hdfs.TestRenameWhileOpen |
|   | hadoop.hdfs.TestBlocksScheduledCounter |
|   | hadoop.hdfs.TestRollingUpgradeRollback |
|   | hadoop.hdfs.protocolPB.TestPBHelper |
|   | hadoop.hdfs.tools.TestDFSAdminWithHA |
|   | hadoop.hdfs.TestDataTransferKeepalive |
|   | hadoop.hdfs.TestFSInputChecker |
|   | hadoop.hdfs.shortcircuit.TestShortCircuitLocalRead |
|   | hadoop.hdfs.TestRead |
|   | hadoop.hdfs.TestDistributedFileSystem |
|   | hadoop.hdfs.TestHDFSTrash |
|   | hadoop.hdfs.TestExternalBlockReader |
|   | hadoop.hdfs.TestDatanodeRegistration |
|   | hadoop.hdfs.TestCrcCorruption |
|   | hadoop.hdfs.tools.TestDFSHAAdminMiniCluster |
|   | hadoop.hdfs.TestSmallBlock |
|   | hadoop.hdfs.TestDFSRollback |
|   | hadoop.hdfs.TestDFSStorageStateRecovery |
|   | hadoop.hdfs.TestDFSUtil |
|   | hadoop.hdfs.TestHdfsAdmin |
|   | hadoop.hdfs.tools.offlineImageViewer.TestOfflineImageViewer |
|   | hadoop.hdfs.tools.offlineImageViewer.TestOfflineImageViewerForContentSummary |
|   | hadoop.hdfs.TestAbandonBlock |
|   | hadoop.hdfs.TestConnCache |
|   | hadoop.hdfs.TestFileCorruption |
|   | hadoop.hdfs.TestHDFSServerPorts |
|   | hadoop.hdfs.TestParallelShortCircuitLegacyRead |
|   | hadoop.hdfs.TestRollingUpgradeDowngrade |
|   | hadoop.hdfs.TestDFSFinalize |
|   | hadoop.hdfs.TestLocalDFS |
|   | hadoop.hdfs.TestBlockMissingException |
|   | hadoop.hdfs.TestFileAppend3 |
|   | hadoop.hdfs.TestFileLengthOnClusterRestart |
|   | hadoop.hdfs.crypto.TestHdfsCryptoStreams |
|   | hadoop.hdfs.TestDatanodeStartupFixesLegacyStorageIDs |
|   | hadoop.hdfs.TestRollingUpgrade |
|   | hadoop.hdfs.tools.TestDebugAdmin |
|   | hadoop.hdfs.TestPersistBlocks |
|   | hadoop.hdfs.tools.offlineEditsViewer.TestOfflineEditsViewer |
|   | hadoop.hdfs.protocol.datatransfer.sasl.TestSaslDataTransfer |
|   | hadoop.hdfs.TestDFSPermission |
|   | hadoop.hdfs.TestDFSInotifyEventInputStream |
|   | hadoop.hdfs.TestFileAppend |
|   | hadoop.hdfs.TestDFSClientExcludedNodes |
|   | hadoop.hdfs.TestMiniDFSCluster |
|   | hadoop.hdfs.TestParallelRead |
|   | hadoop.hdfs.TestPread |
|   | hadoop.tracing.TestTracing |
|   | hadoop.hdfs.TestReservedRawPaths |
|   | hadoop.hdfs.TestEncryptionZonesWithHA |
|   | hadoop.hdfs.TestParallelShortCircuitReadNoChecksum |
|   | hadoop.hdfs.TestHFlush |
|   | hadoop.hdfs.TestParallelUnixDomainRead |
|   | hadoop.hdfs.TestDatanodeReport |
|   | hadoop.hdfs.security.TestDelegationTokenForProxyUser |
|   | hadoop.hdfs.TestDatanodeLayoutUpgrade |
|   | hadoop.hdfs.TestFileAppendRestart |
|   | hadoop.hdfs.TestRemoteBlockReader2 |
|   | hadoop.hdfs.TestSetrepIncreasing |
|   | hadoop.hdfs.security.TestDelegationToken |
|   | hadoop.hdfs.shortcircuit.TestShortCircuitCache |
|   | hadoop.hdfs.TestReadWhileWriting |
|   | hadoop.hdfs.tools.offlineImageViewer.TestOfflineImageViewerForXAttr |
|   | hadoop.hdfs.TestLease |
|   | hadoop.hdfs.TestEncryptedTransfer |
|   | hadoop.hdfs.TestFetchImage |
|   | hadoop.hdfs.TestDFSUpgradeFromImage |
|   | hadoop.hdfs.TestReplaceDatanodeOnFailure |
|   | hadoop.hdfs.TestEncryptionZonesWithKMS |
|   | hadoop.hdfs.TestClientBlockVerification |
|   | hadoop.hdfs.TestGetBlocks |
|   | hadoop.hdfs.TestWriteBlockGetsBlockLengthHint |
|   | hadoop.hdfs.TestMissingBlocksAlert |
|   | hadoop.hdfs.security.token.block.TestBlockToken |
|   | hadoop.hdfs.tools.TestDFSZKFailoverController |
|   | hadoop.hdfs.TestBlockReaderLocal |
|   | hadoop.hdfs.TestHDFSFileSystemContract |
|   | hadoop.hdfs.TestDFSStartupVersions |
|   | hadoop.hdfs.TestAppendSnapshotTruncate |
|   | hadoop.hdfs.TestDatanodeDeath |
|   | hadoop.hdfs.TestSafeMode |
|   | hadoop.hdfs.TestListFilesInFileContext |
|   | hadoop.hdfs.TestSeekBug |
|   | hadoop.hdfs.tools.offlineImageViewer.TestOfflineImageViewerForAcl |
|   | hadoop.hdfs.TestDisableConnCache |
|   | hadoop.hdfs.TestLargeBlock |
|   | hadoop.hdfs.TestBlockReaderLocalLegacy |
|   | hadoop.hdfs.TestMultiThreadedHflush |
|   | hadoop.tracing.TestTracingShortCircuitLocalRead |
|   | hadoop.hdfs.TestClose |
|   | hadoop.hdfs.TestSetTimes |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12761918/HDFS-8873.006.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / c890c51 |
| checkstyle |  https://builds.apache.org/job/PreCommit-HDFS-Build/12625/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/12625/artifact/patchprocess/whitespace.txt
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/12625/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/12625/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/12625/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, HDFS-8873.002.patch, HDFS-8873.003.patch, HDFS-8873.004.patch,
HDFS-8873.005.patch, HDFS-8873.006.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) 



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