[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2018-04-11 Thread Wei-Chiu Chuang (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16434671#comment-16434671
 ] 

Wei-Chiu Chuang commented on HDFS-8824:
---

Looks like HDFS-13222 address Kihwal's concern. It makes it easy to tune the 
small block parameter from balancer side.

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
>Priority: Major
> Fix For: 2.8.0, 2.7.4, 3.0.0-alpha1
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2016-11-18 Thread Zhe Zhang (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15678217#comment-15678217
 ] 

Zhe Zhang commented on HDFS-8824:
-

Good finding Kihwal. +1 on extending the documentation with this effect.

Should we change the default value of 10MB?

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0, 2.7.4, 3.0.0-alpha1
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2016-11-18 Thread Kihwal Lee (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15677540#comment-15677540
 ] 

Kihwal Lee commented on HDFS-8824:
--

While this will initially increase the efficiency of balancing, it is not 
without a negative side-effect.

Older nodes in a cluster will slowly filled with smaller blocks as time goes 
on. This is accelerated if the cluster is heterogeneous.  The smaller nodes 
will fill up more quickly/frequently and the balancer will move only big blocks 
out of those nodes.  As more balacing happens, those nodes will contain more 
and more small blocks. If sufficient time passes, the blocks on those nodes 
will almost entirely small.

This feature can be enabled for quickly resolving a storage balance issue, but 
long-term use can have unintended side-effect.  Fortunately, we have not 
released any  (other than alpha) with this feature. We can include more 
information in the release note and/or address the issue in the code/config.

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0, 2.7.4, 3.0.0-alpha1
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698295#comment-14698295
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #277 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/277/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698284#comment-14698284
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Hdfs-trunk #2215 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/2215/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698277#comment-14698277
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #285 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/285/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698272#comment-14698272
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2234 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2234/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698229#comment-14698229
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Yarn-trunk #1018 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk/1018/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-15 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698219#comment-14698219
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #288 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/288/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Fix For: 2.8.0
>
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-14 Thread Hudson (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14697679#comment-14697679
 ] 

Hudson commented on HDFS-8824:
--

FAILURE: Integrated in Hadoop-trunk-Commit #8308 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/8308/])
HDFS-8824. Do not use small blocks for balancing the cluster. (szetszwo: rev 
2bc0a4f299fbd8035e29f62ce9cd22e209a62805)
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java


> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-13 Thread Jitendra Nath Pandey (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696520#comment-14696520
 ] 

Jitendra Nath Pandey commented on HDFS-8824:


+1 for the latest patch.

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-08-11 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14692764#comment-14692764
 ] 

Hadoop QA commented on HDFS-8824:
-

\\
\\
| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m 27s | 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 44s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 52s | 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 23s | The applied patch generated  5 
new checkstyle issues (total was 523, now 525). |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 20s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | 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  7s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests |  90m  5s | Tests failed in hadoop-hdfs. |
| | | 134m 31s | |
\\
\\
|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestAppendSnapshotTruncate |
|   | hadoop.hdfs.TestLeaseRecovery2 |
| Timed out tests | org.apache.hadoop.hdfs.TestListFilesInFileContext |
|   | org.apache.hadoop.hdfs.server.datanode.TestDataNodeRollingUpgrade |
\\
\\
|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12749952/h8824_20150811b.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 7c796fd |
| checkstyle |  
https://builds.apache.org/job/PreCommit-HDFS-Build/11969/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
 |
| hadoop-hdfs test log | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11969/artifact/patchprocess/testrun_hadoop-hdfs.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11969/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.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/11969/console |


This message was automatically generated.

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Attachments: h8824_20150727b.patch, h8824_20150811b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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[jira] [Commented] (HDFS-8824) Do not use small blocks for balancing the cluster

2015-07-27 Thread Hadoop QA (JIRA)

[ 
https://issues.apache.org/jira/browse/HDFS-8824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643834#comment-14643834
 ] 

Hadoop QA commented on HDFS-8824:
-

\\
\\
| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m 17s | 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 40s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 39s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 26s | The applied patch generated  
12 new checkstyle issues (total was 786, now 792). |
| {color:green}+1{color} | whitespace |   0m  1s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 22s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   2m 34s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m  3s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 221m 38s | Tests failed in hadoop-hdfs. |
| | | 265m 39s | |
\\
\\
|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestFileStatus |
|   | hadoop.hdfs.server.balancer.TestBalancerWithHANameNodes |
|   | hadoop.hdfs.TestReadWhileWriting |
|   | hadoop.hdfs.TestFSOutputSummer |
|   | hadoop.hdfs.TestParallelShortCircuitLegacyRead |
|   | hadoop.hdfs.TestAppendSnapshotTruncate |
|   | hadoop.hdfs.server.balancer.TestBalancerWithEncryptedTransfer |
|   | hadoop.hdfs.TestDFSClientRetries |
|   | hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup |
| Timed out tests | 
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockTokenWithDFS |
|   | org.apache.hadoop.hdfs.server.balancer.TestBalancerWithMultipleNameNodes |
|   | org.apache.hadoop.hdfs.server.balancer.TestBalancerWithSaslDataTransfer |
|   | org.apache.hadoop.hdfs.server.balancer.TestBalancer |
\\
\\
|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12747457/h8824_20150727b.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 3e6fce9 |
| checkstyle |  
https://builds.apache.org/job/PreCommit-HDFS-Build/11850/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
 |
| hadoop-hdfs test log | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11850/artifact/patchprocess/testrun_hadoop-hdfs.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11850/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf900.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/11850/console |


This message was automatically generated.

> Do not use small blocks for balancing the cluster
> -
>
> Key: HDFS-8824
> URL: https://issues.apache.org/jira/browse/HDFS-8824
> Project: Hadoop HDFS
>  Issue Type: Sub-task
>  Components: balancer & mover
>Reporter: Tsz Wo Nicholas Sze
>Assignee: Tsz Wo Nicholas Sze
> Attachments: h8824_20150727b.patch
>
>
> Balancer gets datanode block lists from NN and then move the blocks in order 
> to balance the cluster.  It should not use the blocks with small size since 
> moving the small blocks generates a lot of overhead and the small blocks do 
> not help balancing the cluster much.



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