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From "Hadoop QA (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14740) HDFS read cache persistence support
Date Fri, 11 Oct 2019 18:51:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949712#comment-16949712
] 

Hadoop QA commented on HDFS-14740:
----------------------------------

| (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 41s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  8m  7s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 18m 55s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 16m  7s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 43s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 47s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 18m 58s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 19s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m  7s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 24s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 46s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 14m 35s{color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} cc {color} | {color:red} 14m 35s{color} | {color:red}
root generated 4 new + 22 unchanged - 4 fixed = 26 total (was 26) {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 14m 35s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 42s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 34s{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} xml {color} | {color:green}  0m  1s{color} | {color:green}
The patch has no ill-formed XML file. {color} |
| {color:red}-1{color} | {color:red} shadedclient {color} | {color:red} 11m 39s{color} | {color:red}
patch has errors when building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 18s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  3m  1s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 46s{color} | {color:green}
hadoop-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 84m 55s{color} | {color:red}
hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 58s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}209m 44s{color} | {color:black}
{color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.TestMultipleNNPortQOP |
|   | hadoop.hdfs.server.namenode.snapshot.TestRenameWithSnapshots |
|   | hadoop.hdfs.server.namenode.TestDecommissioningStatus |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.3 Server=19.03.3 Image:yetus/hadoop:104ccca9169 |
| JIRA Issue | HDFS-14740 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12982800/HDFS-14740.006.patch
|
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit
 shadedclient  findbugs  checkstyle  cc  xml  |
| uname | Linux a674b6b62230 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / ec86f42 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_222 |
| findbugs | v3.1.0-RC1 |
| cc | https://builds.apache.org/job/PreCommit-HDFS-Build/28070/artifact/out/diff-compile-cc-root.txt
|
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/28070/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/28070/testReport/ |
| Max. process+thread count | 4085 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/28070/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> HDFS read cache persistence support
> -----------------------------------
>
>                 Key: HDFS-14740
>                 URL: https://issues.apache.org/jira/browse/HDFS-14740
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: caching, datanode
>            Reporter: Feilong He
>            Assignee: Rui Mo
>            Priority: Major
>         Attachments: HDFS-14740.000.patch, HDFS-14740.001.patch, HDFS-14740.002.patch,
HDFS-14740.003.patch, HDFS-14740.004.patch, HDFS-14740.005.patch, HDFS-14740.006.patch
>
>
> In HDFS-13762, persistent memory (PM) is enabled in HDFS centralized cache management.
Even though PM can persist cache data, for simplifying the initial implementation, the previous
cache data will be cleaned up during DataNode restarts. Here, we are proposing to improve
HDFS PM cache by taking advantage of PM's data persistence characteristic, i.e., recovering
the status for cached data, if any, when DataNode restarts, thus, cache warm up time can be
saved for user.



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