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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17353) Cache famLen in OffheapKeyValue
Date Wed, 21 Dec 2016 07:32:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15766364#comment-15766364
] 

Hadoop QA commented on HBASE-17353:
-----------------------------------

| (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 12s {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: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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 2s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 14s {color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 19s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 9s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 33s {color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 14s {color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 16s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 14s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 14s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 20s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 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} hadoopcheck {color} | {color:green} 25m 22s {color}
| {color:green} Patch does not cause any errors with Hadoop 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5
2.7.1 2.7.2 2.7.3 or 3.0.0-alpha1. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 39s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 14s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 41s {color} | {color:green}
hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 8s {color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 34m 0s {color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12844190/HBASE-17353.patch
|
| JIRA Issue | HBASE-17353 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle
 compile  |
| uname | Linux 69e8bc239f74 3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12 17:00:09 UTC 2016
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
|
| git revision | master / e1f4aae |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/5010/testReport/ |
| modules | C: hbase-common U: hbase-common |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/5010/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Cache famLen in OffheapKeyValue
> -------------------------------
>
>                 Key: HBASE-17353
>                 URL: https://issues.apache.org/jira/browse/HBASE-17353
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17353.patch, OffheapKV famLen cost.png
>
>
> WE need to discuss here. Already we had a TODO here. But this comes again after offheap
memstore is committed in trunk. 
> Attaching a screenshot to show the impact. True that these changes won't have a direct
impact on the final perf but at micro level they would have. 
> In case of KeyValue it is just retrieving a byte from the byte[] (o(1) access).
> But here we need to access the memory to retrive that one byte though it is Unsafe based.



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