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https://issues.apache.org/jira/browse/HBASE-18133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16380771#comment-16380771
 ] 

Hadoop QA commented on HBASE-18133:
-----------------------------------

| (/) *{color:green}+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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 13 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
27s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
57s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
12s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
41s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  6m 
42s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 
36s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
52s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
14s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  4m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
10s{color} | {color:green} The patch hbase-hadoop-compat passed checkstyle 
{color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
12s{color} | {color:green} The patch hbase-hadoop2-compat passed checkstyle 
{color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
15s{color} | {color:green} hbase-server: The patch generated 0 new + 546 
unchanged - 3 fixed = 546 total (was 549) {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 
41s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
18m 32s{color} | {color:green} Patch does not cause any errors with Hadoop 
2.6.5 2.7.4 or 3.0.0. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m  
2s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
53s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
24s{color} | {color:green} hbase-hadoop-compat in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
29s{color} | {color:green} hbase-hadoop2-compat in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 95m 
39s{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
57s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}145m 11s{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-18133 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12912447/HBASE-18133.009.patch 
|
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  
hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux 11b78d77d24d 3.13.0-139-generic #188-Ubuntu SMP Tue Jan 9 
14:43:09 UTC 2018 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 / 6cfa208add |
| maven | version: Apache Maven 3.5.2 
(138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) |
| Default Java | 1.8.0_151 |
| findbugs | v3.1.0-RC3 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11724/testReport/ |
| Max. process+thread count | 4537 (vs. ulimit of 10000) |
| modules | C: hbase-hadoop-compat hbase-hadoop2-compat hbase-server U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/11724/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Low-latency space quota size reports
> ------------------------------------
>
>                 Key: HBASE-18133
>                 URL: https://issues.apache.org/jira/browse/HBASE-18133
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: HBASE-18133.001.patch, HBASE-18133.002.patch, 
> HBASE-18133.003.patch, HBASE-18133.004.patch, HBASE-18133.005.patch, 
> HBASE-18133.006.patch, HBASE-18133.007.patch, HBASE-18133.008.patch, 
> HBASE-18133.009.patch
>
>
> Presently space quota enforcement relies on RegionServers sending reports to 
> the master about each Region that they host. This is done by periodically, 
> reading the cached size of each HFile in each Region (which was ultimately 
> computed from HDFS).
> This means that the Master is unaware of Region size growth until the the 
> next time this chore in a RegionServer fires which is a fair amount of 
> latency (a few minutes, by default). Operations like flushes, compactions, 
> and bulk-loads are delayed even though the RegionServer is running those 
> operations locally.
> Instead, we can create an API which these operations could invoke that would 
> automatically update the size of the Region being operated on. For example, a 
> successful flush can report that the size of a Region increased by the size 
> of the flush. A compaction can subtract the size of the input files of the 
> compaction and add in the size of the resulting file.
> This de-couples the computation of a Region's size from sending the Region 
> sizes to the Master, allowing us to send reports more frequently, increasing 
> the responsiveness of the cluster to size changes.



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