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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15158) Change order in which we do write pipeline operations; do all under row locks!
Date Wed, 03 Feb 2016 22:03:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15131233#comment-15131233
] 

Hadoop QA commented on HBASE-15158:
-----------------------------------

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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s {color} | {color:blue}
Docker mode activated. {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 1 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 38s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 31s {color} |
{color:green} master passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 34s {color} |
{color:green} master passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 4m 0s {color}
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| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 16s {color}
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 25s {color} |
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 32s {color} |
{color:green} master passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 45s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 31s {color} |
{color:green} the patch passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 31s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 35s {color} |
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| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 35s {color} | {color:green}
the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 4m 4s {color} | {color:red}
Patch generated 8 new checkstyle issues in hbase-server (total was 331, now 254). {color}
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| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 17s {color}
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| {color:green} Patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 23m 3s {color}
| {color:green} Patch does not cause any errors with Hadoop 2.4.0 2.4.1 2.5.0 2.5.1 2.5.2
2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 59s {color} |
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 36s {color} |
{color:green} the patch passed with JDK v1.7.0_91 {color} |
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hbase-server in the patch passed with JDK v1.8.0_72. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 100m 27s {color} | {color:green}
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| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 17s {color}
| {color:green} Patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 244m 30s {color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=1.9.1 Server=1.9.1 Image:yetus/hbase:date2016-02-03 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12786057/15158v4.patch
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| JIRA Issue | HBASE-15158 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle
 compile  |
| uname | Linux d75a4ea836fc 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 |
| Build tool | maven |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
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| git revision | master / 2f57673 |
| findbugs | v3.0.0 |
| checkstyle | https://builds.apache.org/job/PreCommit-HBASE-Build/416/artifact/patchprocess/diff-checkstyle-hbase-server.txt
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| JDK v1.7.0_91  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/416/testReport/
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| modules | C: hbase-server U: hbase-server |
| Max memory used | 174MB |
| Powered by | Apache Yetus 0.1.0   http://yetus.apache.org |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/416/console |


This message was automatically generated.



> Change order in which we do write pipeline operations; do all under row locks!
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-15158
>                 URL: https://issues.apache.org/jira/browse/HBASE-15158
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.0.0
>
>         Attachments: 15158.patch, 15158v2.patch, 15158v3.patch, 15158v4.patch, 15158v4.patch
>
>
> Change how we do our write pipeline. I want to do all write pipeline ops under row lock
so I lean on this fact fixing performance regression in check-and-set type operations like
increment, append, and checkAnd* (see sibling issue HBASE-15082).
> To be specific, we write like this now:
> {code}
> # take rowlock
> # start mvcc
> # append to WAL
> # add to memstore
> # let go of rowlock
> # sync WAL
> # in case of error: rollback memstore
> {code}
> Instead, write like this:
> {code}
> # take rowlock
> # start mvcc
> # append to WAL
> # sync WAL
> # add to memstore
> # let go of rowlock
> ... no need to do rollback.
> {code}
> The old ordering was put in place because it got better performance in a time when WAL
was different and before row locks were read/write (HBASE-12751).
> Testing in branch-1 shows that a reordering and skipping mvcc waits gets us back to the
performance we had before we unified mvcc and sequenceid (HBASE-8763). Tests in HBASE-15046
show that at the macro level using our usual perf tools, reordering pipeline seems to cause
no slowdown (see HBASE-15046). A rough compare of increments with reordered write pipeline
seems to have us getting back a bunch of our performance (see tail of https://issues.apache.org/jira/browse/HBASE-15082?focusedCommentId=15111703&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15111703
and subsequent comment).



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