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https://issues.apache.org/jira/browse/HDFS-17496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17908036#comment-17908036
]
ASF GitHub Bot commented on HDFS-17496:
---------------------------------------
hadoop-yetus commented on PR #6764:
URL: https://github.com/apache/hadoop/pull/6764#issuecomment-2560823848
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 34s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
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| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 0s | | detect-secrets was not available.
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| +0 :ok: | xmllint | 0m 0s | | xmllint was not available. |
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
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| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
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|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 35m 0s | | trunk passed |
| +1 :green_heart: | compile | 1m 19s | | trunk passed with JDK
Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 |
| +1 :green_heart: | compile | 1m 8s | | trunk passed with JDK
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| +1 :green_heart: | javadoc | 1m 11s | | trunk passed with JDK
Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 |
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| +1 :green_heart: | spotbugs | 3m 6s | | trunk passed |
| +1 :green_heart: | shadedclient | 35m 15s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | mvninstall | 1m 7s | | the patch passed |
| +1 :green_heart: | compile | 1m 11s | | the patch passed with JDK
Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 |
| +1 :green_heart: | javac | 1m 11s | | the patch passed |
| +1 :green_heart: | compile | 1m 1s | | the patch passed with JDK
Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga |
| +1 :green_heart: | javac | 1m 1s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | checkstyle | 0m 57s | | the patch passed |
| +1 :green_heart: | mvnsite | 1m 8s | | the patch passed |
| +1 :green_heart: | javadoc | 0m 58s | | the patch passed with JDK
Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 |
| +1 :green_heart: | javadoc | 1m 32s | | the patch passed with JDK
Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga |
| +1 :green_heart: | spotbugs | 3m 9s | | the patch passed |
| +1 :green_heart: | shadedclient | 35m 0s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 237m 22s | | hadoop-hdfs in the patch
passed. |
| +1 :green_heart: | asflicense | 0m 47s | | The patch does not
generate ASF License warnings. |
| | | 364m 5s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.47 ServerAPI=1.47 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6764/16/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/6764 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets xmllint |
| uname | Linux 0559900680e3 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27
20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 226cd5b046e5a4aaeb66c58812740d0714fc9bbb |
| Default Java | Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
/usr/lib/jvm/java-8-openjdk-amd64:Private
Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6764/16/testReport/ |
| Max. process+thread count | 3230 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U:
hadoop-hdfs-project/hadoop-hdfs |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6764/16/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
This message was automatically generated.
> DataNode supports more fine-grained dataset lock based on blockid
> -----------------------------------------------------------------
>
> Key: HDFS-17496
> URL: https://issues.apache.org/jira/browse/HDFS-17496
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2024-04-23-16-17-07-057.png
>
>
> Recently, we used NvmeSSD as volumes in datanodes and performed some stress
> tests.
> We found that NvmeSSD and HDD disks achieve similar performance when create
> lots of small files, such as 10KB.
> This phenomenon is counterintuitive. After analyzing the metric monitoring ,
> we found that fsdataset lock became the bottleneck in high concurrency
> scenario.
>
> Currently, we have two level locks which are BLOCK_POOL and VOLUME. We can
> further split the volume lock to DIR lock.
> DIR lock is defined as below： given a blockid, we can determine which subdir
> this block will be placed in finalized dir. We just use
> subdir[0-31]/subdir[0-31] as the
> name of DIR lock.
> More details, please refer to method DatanodeUtil#idToBlockDir：
> {code:java}
> public static File idToBlockDir(File root, long blockId) {
> int d1 = (int) ((blockId >> 16) & 0x1F);
> int d2 = (int) ((blockId >> 8) & 0x1F);
> String path = DataStorage.BLOCK_SUBDIR_PREFIX + d1 + SEP +
> DataStorage.BLOCK_SUBDIR_PREFIX + d2;
> return new File(root, path);
> } {code}
> The performance comparison is as below:
> experimental setup:
> 3 DataNodes with single disk.
> 10 Cients concurrent write and delete files after writing.
> 550 threads per Client.
> !image-2024-04-23-16-17-07-057.png!
>
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