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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17339) Scan-Memory-First Optimization for Get Operations
Date Wed, 08 Feb 2017 09:29:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15857712#comment-15857712
] 

Hadoop QA commented on HBASE-17339:
-----------------------------------

| (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 16s {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 2 new or modified test files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 10s {color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 39s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 48s {color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 40s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 23s {color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 18s {color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 39s {color} |
{color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 10s {color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 53s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 47s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 47s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 41s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 23s {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:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 1m 31s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.6.1. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 3m 3s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.6.2. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 4m 36s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.6.3. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 6m 7s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.6.4. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 7m 39s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.6.5. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 9m 10s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.7.1. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 10m 44s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.7.2. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 12m 17s {color} | {color:red}
The patch causes 17 errors with Hadoop v2.7.3. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 13m 51s {color} | {color:red}
The patch causes 17 errors with Hadoop v3.0.0-alpha2. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 1m 45s {color} | {color:red}
hbase-server generated 1 new + 0 unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 42s {color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 20s {color} | {color:green}
hbase-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 17m 39s {color} | {color:red}
hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 15s {color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 48m 49s {color} | {color:black}
{color} |
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|| Reason || Tests ||
| FindBugs | module:hbase-server |
|  |  Suspicious comparison of Long references in org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.recheckTSMonotonicity(InternalScan)
 At HRegion.java:in org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.recheckTSMonotonicity(InternalScan)
 At HRegion.java:[line 6429] |
| Failed junit tests | hadoop.hbase.io.TestHeapSize |
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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/12851585/HBASE-17339-V03.patch
|
| JIRA Issue | HBASE-17339 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle
 compile  |
| uname | Linux 40f83aad96a8 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 13:48:03 UTC 2016
x86_64 x86_64 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 / d8f3c6c |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| findbugs | https://builds.apache.org/job/PreCommit-HBASE-Build/5626/artifact/patchprocess/new-findbugs-hbase-server.html
|
| unit | https://builds.apache.org/job/PreCommit-HBASE-Build/5626/artifact/patchprocess/patch-unit-hbase-server.txt
|
| unit test logs |  https://builds.apache.org/job/PreCommit-HBASE-Build/5626/artifact/patchprocess/patch-unit-hbase-server.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/5626/testReport/ |
| modules | C: hbase-client hbase-server U: . |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/5626/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Scan-Memory-First Optimization for Get Operations
> -------------------------------------------------
>
>                 Key: HBASE-17339
>                 URL: https://issues.apache.org/jira/browse/HBASE-17339
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Eshcar Hillel
>            Assignee: Eshcar Hillel
>         Attachments: HBASE-17339-V01.patch, HBASE-17339-V02.patch, HBASE-17339-V03.patch,
HBASE-17339-V03.patch
>
>
> The current implementation of a get operation (to retrieve values for a specific key)
scans through all relevant stores of the region; for each store both memory components (memstores
segments) and disk components (hfiles) are scanned in parallel.
> We suggest to apply an optimization that speculatively scans memory-only components first
and only if the result is incomplete scans both memory and disk.



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