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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7967) Reduce the performance impact of the balancer
Date Tue, 10 Jan 2017 02:28:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813598#comment-15813598
] 

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

| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 17s{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}  9m  7s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 41s{color} |
{color:green} branch-2 passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 43s{color} |
{color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 31s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 54s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 23s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 57s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 56s{color} |
{color:green} branch-2 passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 34s{color} |
{color:green} branch-2 passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 43s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 38s{color} |
{color:green} the patch passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 38s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 41s{color} |
{color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 41s{color} | {color:green}
the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  0m 28s{color}
| {color:orange} hadoop-hdfs-project/hadoop-hdfs: The patch generated 5 new + 366 unchanged
- 9 fixed = 371 total (was 375) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 49s{color} |
{color:green} the patch passed {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:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 11s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 51s{color} |
{color:green} the patch passed with JDK v1.8.0_111 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 33s{color} |
{color:green} the patch passed with JDK v1.7.0_121 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 66m 55s{color} | {color:green}
hadoop-hdfs in the patch passed with JDK v1.7.0_121. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 20s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}159m 23s{color} | {color:black}
{color} |
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|| Reason || Tests ||
| JDK v1.8.0_111 Failed junit tests | hadoop.hdfs.server.blockmanagement.TestBlockStatsMXBean
|
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:b59b8b7 |
| JIRA Issue | HDFS-7967 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12846448/HDFS-7967.branch-2.002.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux b8546401be71 3.13.0-96-generic #143-Ubuntu SMP Mon Aug 29 20:15:20 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 / 447f713 |
| 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 |
| checkstyle | https://builds.apache.org/job/PreCommit-HDFS-Build/18121/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt
|
| JDK v1.7.0_121  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/18121/testReport/
|
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/18121/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, HDFS-7967.branch-2-1.patch,
HDFS-7967.branch-2.001.patch, HDFS-7967.branch-2.002.patch, HDFS-7967.branch-2.8-1.patch,
HDFS-7967.branch-2.8.001.patch, HDFS-7967.branch-2.8.002.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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