[ 
https://issues.apache.org/jira/browse/HBASE-19357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16270574#comment-16270574
 ] 

Hadoop QA commented on HBASE-19357:
-----------------------------------

| (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 
13s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {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 6 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
30s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
 0s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
48s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  3m 
 2s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  9m 
 8s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
53s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
16s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 
19s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
26s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  2m 
26s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
34s{color} | {color:green} The patch hbase-common passed checkstyle {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red}  0m 
38s{color} | {color:red} hbase-client: The patch generated 4 new + 110 
unchanged - 2 fixed = 114 total (was 112) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
20s{color} | {color:green} hbase-server: The patch generated 0 new + 182 
unchanged - 18 fixed = 182 total (was 200) {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
12s{color} | {color:green} The patch hbase-external-blockcache passed 
checkstyle {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch has 808 line(s) that end in whitespace. Use 
git apply --whitespace=fix <<patch_file>>. Refer 
https://git-scm.com/docs/git-apply {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m 
25s{color} | {color:red} The patch 384 line(s) with tabs. {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  
2s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  5m 
55s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
63m 23s{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 2.7.4 or 3.0.0-alpha4. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
33s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
35s{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
57s{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}129m  7s{color} 
| {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
26s{color} | {color:green} hbase-external-blockcache in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  1m 
 5s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}235m 55s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.wal.TestAsyncLogRolling |
|   | hadoop.hbase.client.TestReplicaWithCluster |
|   | hadoop.hbase.client.TestBlockEvictionFromClient |
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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-19357 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12899761/HBASE-19357_V2.patch |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  shadedjars  
hadoopcheck  hbaseanti  checkstyle  compile  xml  |
| uname | Linux f54e1c485ed5 3.13.0-133-generic #182-Ubuntu SMP Tue Sep 19 
15:49:21 UTC 2017 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 / e67a3699c4 |
| maven | version: Apache Maven 3.5.2 
(138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) |
| Default Java | 1.8.0_151 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/artifact/patchprocess/diff-checkstyle-hbase-client.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/artifact/patchprocess/whitespace-eol.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/artifact/patchprocess/whitespace-tabs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/testReport/ |
| modules | C: hbase-common hbase-client hbase-server hbase-external-blockcache 
U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/10104/console |
| Powered by | Apache Yetus 0.6.0   http://yetus.apache.org |


This message was automatically generated.



> Bucket cache no longer L2 for LRU cache
> ---------------------------------------
>
>                 Key: HBASE-19357
>                 URL: https://issues.apache.org/jira/browse/HBASE-19357
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19357.patch, HBASE-19357.patch, 
> HBASE-19357_V2.patch
>
>
> When Bucket cache is used, by default we dont configure it as an L2 cache 
> alone. The default setting is combined mode ON where the data blocks to 
> Bucket cache and index/bloom blocks go to LRU cache. But there is a way to 
> turn this off and make LRU as L1 and Bucket cache as a victim handler for L1. 
> It will be just L2.   
> After the off heap read path optimization Bucket cache is no longer slower 
> compared to L1. We have test results on data sizes from 12 GB.  The Alibaba 
> use case was also with 12 GB and they have observed a ~30% QPS improve over 
> the LRU cache.
> This issue is to remove the option for combined mode = false. So when Bucket 
> cache is in use, data blocks will go to it only and LRU will get only index 
> /meta/bloom blocks.   Bucket cache will no longer be configured as a victim 
> handler for LRU.
> Note : WHen external cache is in use, there only the L1 L2 thing comes. LRU 
> will be L1 and external cache act as its L2. That make full sense.



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