[ https://issues.apache.org/jira/browse/HBASE-17339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15942268#comment-15942268 ]
Hadoop QA commented on HBASE-17339: ----------------------------------- | (/) *{color:green}+1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 17s {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 3 new or modified test files. {color} | | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 23s {color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 17s {color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 14s {color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 10s {color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 41s {color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 54s {color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 53s {color} | {color:green} master passed {color} | | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 12s {color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 24s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 18s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 18s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 13s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 43s {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} 28m 37s {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-alpha2. {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 7s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 56s {color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 21s {color} | {color:green} hbase-client in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 103m 24s {color} | {color:green} hbase-server in the patch passed. {color} | | {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 25s {color} | {color:green} hbase-it in the patch passed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 43s {color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 155m 55s {color} | {color:black} {color} | \\ \\ || 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/12860563/HBASE-17339-V06.patch | | JIRA Issue | HBASE-17339 | | Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck hbaseanti checkstyle compile | | uname | Linux 83eadd35175c 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6 15:44:32 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 / 4a076cd | | Default Java | 1.8.0_121 | | findbugs | v3.0.0 | | Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/6223/testReport/ | | modules | C: hbase-client hbase-server hbase-it U: . | | Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/6223/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, HBASE-17339-V04.patch, > HBASE-17339-V05.patch, HBASE-17339-V06.patch, read-latency-mixed-workload.jpg > > > 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. -- This message was sent by Atlassian JIRA (v6.3.15#6346)