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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7967) Reduce the performance impact of the balancer
Date Thu, 05 Jan 2017 18:25:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15802106#comment-15802106
] 

Hadoop QA commented on HDFS-7967:
---------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 15s{color} | {color:blue}
Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 2 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 15s{color}
| {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 45s{color} |
{color:green} branch-2.8 passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 49s{color} |
{color:green} branch-2.8 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 15s{color}
| {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 47s{color} |
{color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 41s{color}
| {color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 36s{color} |
{color:green} branch-2.8 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m  8s{color} |
{color:green} branch-2.8 passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m 24s{color} |
{color:green} branch-2.8 passed with JDK v1.7.0_121 {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 44s{color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 36s{color} |
{color:green} the patch passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 36s{color} | {color:green}
the patch passed {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red}  0m 49s{color} | {color:red}
hadoop-hdfs in the patch failed with JDK v1.7.0_121. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  0m 49s{color} | {color:red}
hadoop-hdfs in the patch failed with JDK v1.7.0_121. {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  1m  2s{color}
| {color:orange} hadoop-hdfs-project/hadoop-hdfs: The patch generated 6 new + 457 unchanged
- 13 fixed = 463 total (was 470) {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red}  0m 33s{color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 13s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  0s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 24s{color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 53s{color} |
{color:green} the patch passed with JDK v1.8.0_111 {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red}  1m 38s{color} | {color:red}
hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121 with JDK v1.7.0_121 generated 6 new + 7 unchanged
- 0 fixed = 13 total (was 7) {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  0m 29s{color} | {color:red}
hadoop-hdfs in the patch failed with JDK v1.7.0_121. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 18s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 86m 32s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:5af2af1 |
| JIRA Issue | HDFS-7967 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12845639/HDFS-7967-branch-2.8.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux e00178d2dcfe 3.13.0-105-generic #152-Ubuntu SMP Fri Dec 2 15:37:11 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | branch-2.8 / 0c1615c |
| Default Java | 1.7.0_121 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_111 /usr/lib/jvm/java-7-openjdk-amd64:1.7.0_121
|
| findbugs | v3.0.0 |
| mvninstall | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-mvninstall-hadoop-hdfs-project_hadoop-hdfs.txt
|
| compile | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
|
| javac | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
|
| checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt
|
| mvnsite | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt
|
| findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-findbugs-hadoop-hdfs-project_hadoop-hdfs.txt
|
| javadoc | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/diff-javadoc-javadoc-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
|
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.7.0_121.txt
|
| JDK v1.7.0_121  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/testReport/
|
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/18037/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Reduce the performance impact of the balancer
> ---------------------------------------------
>
>                 Key: HDFS-7967
>                 URL: https://issues.apache.org/jira/browse/HDFS-7967
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 2.0.0-alpha
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HDFS-7967-branch-2.8.patch, HDFS-7967-branch-2.patch
>
>
> The balancer needs to query for blocks to move from overly full DNs.  The block lookup
is extremely inefficient.  An iterator of the node's blocks is created from the iterators
of its storages' blocks.  A random number is chosen corresponding to how many blocks will
be skipped via the iterator.  Each skip requires costly scanning of triplets.
> The current design also only considers node imbalances while ignoring imbalances within
the nodes's storages.  A more efficient and intelligent design may eliminate the costly skipping
of blocks via round-robin selection of blocks from the storages based on remaining capacity.



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