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https://issues.apache.org/jira/browse/HDFS-11361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924876#comment-15924876
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Hadoop QA commented on HDFS-11361:
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| (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 
17s{color} | {color:blue} Docker mode activated. {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
28s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 13m 
40s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
48s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
44s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
46s{color} | {color:green} HDFS-7240 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
26s{color} | {color:green} HDFS-7240 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
49s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs-client in HDFS-7240 
has 12 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
29s{color} | {color:green} HDFS-7240 passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
20s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 
35s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red}  1m  
2s{color} | {color:red} hadoop-hdfs-project in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  1m  2s{color} 
| {color:red} hadoop-hdfs-project in the patch failed. {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 44s{color} | {color:orange} hadoop-hdfs-project: The patch generated 3 new + 
0 unchanged - 0 fixed = 3 total (was 0) {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red}  0m 
36s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
22s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  
0s{color} | {color:red} The patch 3 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:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 
19s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red}  0m 
48s{color} | {color:red} hadoop-hdfs-project_hadoop-hdfs generated 3 new + 10 
unchanged - 0 fixed = 13 total (was 10) {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m  
2s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  0m 31s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
17s{color} | {color:red} The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 36m 14s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:a9ad5d6 |
| JIRA Issue | HDFS-11361 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12858741/HDFS-11361-HDFS-7240.002.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  xml  |
| uname | Linux e0c582f70856 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 | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | HDFS-7240 / 8eca982 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-client-warnings.html
 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-mvninstall-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| compile | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-compile-hadoop-hdfs-project.txt
 |
| javac | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-compile-hadoop-hdfs-project.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project.txt
 |
| mvnsite | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/whitespace-tabs.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-findbugs-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/diff-javadoc-javadoc-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/artifact/patchprocess/patch-asflicense-problems.txt
 |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client 
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18715/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Block Storage : add cache interface
> -----------------------------------
>
>                 Key: HDFS-11361
>                 URL: https://issues.apache.org/jira/browse/HDFS-11361
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HDFS-11361-HDFS-7240.001.patch, 
> HDFS-11361-HDFS-7240.002.patch
>
>
> This JIRA includes two major pieces: 1. the interface exposed to upper layer 
> operating system that mounts the file system; and 2. the interface exposed to 
> lower layer container storage layer.
> On one hand, to make CBlock mountable and accessible for a POSIX OS, we need 
> to implement file system protocol. We chose to do this by running cblock with 
> jSCSI (http://jscsi.org/) which is a java implementation of iSCSI protocol. 
> More specifically, CBlock volume will exposed as an java-based iSCSI target, 
> and any machine that has iSCSI installed will be able to talk to CBlock 
> volume and mounted locally just as any disks. This is JIRA make a starting 
> point by introducing jSCSI and implementing its {{IStorageModule}}. This will 
> be registered to jSCSI server in future JIRA. 
> One the other hand, to be able to have the CBlock talk to container layer 
> with better performance, CBlock should be able to cache data locally. More 
> specifically, clients' read/write should be performed on the locally disk 
> cache, while threads are pushing and retrieving data in backend. This JIRA 
> takes the first step by defining interfaces for the local cache. 



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