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https://issues.apache.org/jira/browse/HDFS-12351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16248087#comment-16248087
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Hadoop QA commented on HDFS-12351:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
21s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 19m 
50s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
8s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
31m 46s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
8s{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} shadedclient {color} | {color:green} 
11m 43s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
23s{color} | {color:green} The patch does not generate ASF License warnings. 
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| {color:black}{color} | {color:black} {color} | {color:black} 45m 48s{color} | 
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:5b98639 |
| JIRA Issue | HDFS-12351 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12897125/HDFS-12351.001.patch |
| Optional Tests |  asflicense  mvnsite  |
| uname | Linux dc4dbb43c938 3.13.0-129-generic #178-Ubuntu SMP Fri Aug 11 
12:48:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 8a1bd9a |
| maven | version: Apache Maven 3.3.9 |
| Max. process+thread count | 328 (vs. ulimit of 5000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/22046/console |
| Powered by | Apache Yetus 0.7.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Explicitly describe the minimal number of DataNodes required to support an EC 
> policy in EC document.
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-12351
>                 URL: https://issues.apache.org/jira/browse/HDFS-12351
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation, erasure-coding
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Lei (Eddy) Xu
>            Assignee: Hanisha Koneru
>            Priority: Minor
>         Attachments: HDFS-12351.001.patch
>
>
> Should explicitly call out the minimal number of DataNodes (ie.. 5 for 
> RS(3,2)) in EC document, to make it easy to understand for non-storage 
> people. 



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