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https://issues.apache.org/jira/browse/HBASE-20186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16397374#comment-16397374
 ] 

Hadoop QA commented on HBASE-20186:
-----------------------------------

| (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 
18s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green}  0m  
0s{color} | {color:green} Patch does not have any anti-patterns. {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:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  
0s{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
51s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
33s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
11s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  4m 
44s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 
40s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
17s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
39s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
11s{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} shadedjars {color} | {color:green}  4m 
46s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  7m  
0s{color} | {color:red} The patch causes 10 errors with Hadoop v2.6.5. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red}  9m  
8s{color} | {color:red} The patch causes 10 errors with Hadoop v2.7.4. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 11m 
36s{color} | {color:red} The patch causes 10 errors with Hadoop v3.0.0. {color} 
|
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
18s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m 
12s{color} | {color:green} hbase-rsgroup in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
 7s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 33m  3s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:eee3b01 |
| JIRA Issue | HBASE-20186 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12914303/HBASE-20186.master.000.patch
 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  
hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux 37c8b8dceded 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 
13:48:03 UTC 2016 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh
 |
| git revision | master / 72c3d27bf6 |
| maven | version: Apache Maven 3.5.3 
(3383c37e1f9e9b3bc3df5050c29c8aff9f295297; 2018-02-24T19:49:05Z) |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC3 |
| hadoopcheck | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11942/artifact/patchprocess/patch-javac-2.6.5.txt
 |
| hadoopcheck | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11942/artifact/patchprocess/patch-javac-2.7.4.txt
 |
| hadoopcheck | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11942/artifact/patchprocess/patch-javac-3.0.0.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11942/testReport/ |
| Max. process+thread count | 2734 (vs. ulimit of 10000) |
| modules | C: hbase-rsgroup U: hbase-rsgroup |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11942/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Improve RSGroupBasedLoadBalancer#balanceCluster() to be more efficient when 
> calculating cluster state for each rsgroup
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-20186
>                 URL: https://issues.apache.org/jira/browse/HBASE-20186
>             Project: HBase
>          Issue Type: Improvement
>          Components: rsgroup
>            Reporter: Xiang Li
>            Assignee: Xiang Li
>            Priority: Minor
>         Attachments: HBASE-20186.master.000.patch
>
>
> In RSGroupBasedLoadBalancer
> {code}
> public List<RegionPlan> balanceCluster(Map<ServerName, List<RegionInfo>> 
> clusterState)
> {code}
> The second half of the function is to calculate region move plan for regions 
> which have been already placed according to the rsgroup assignment, and it is 
> calculated one rsgroup after another.
> The following logic to check if a server belongs to the rsgroup is not quite 
> efficient, as it does not make good use of the fact that servers in 
> RSGroupInfo is a TreeSet.
> {code}
> for (Address sName : info.getServers()) {
>   for(ServerName curr: clusterState.keySet()) {
>     if(curr.getAddress().equals(sName)) {
>       groupClusterState.put(curr, correctedState.get(curr));
>     }
>   }
> }
> {code}
> Given there are m region servers in the cluster and n region servers for each 
> rsgroup in average, the code above has time complexity as O(m * n), while 
> using TreeSet's contains(), the time complexity could be reduced to O (m * 
> logn).
> Another improvement is we do not need to scan every server for each rsgroup. 
> If the processed server could be recorded,  we could skip those.



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