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https://issues.apache.org/jira/browse/HDFS-17573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866774#comment-17866774
 ] 

ASF GitHub Bot commented on HDFS-17573:
---------------------------------------

hadoop-yetus commented on PR #6929:
URL: https://github.com/apache/hadoop/pull/6929#issuecomment-2233440924

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2  |
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Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08  |
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   |||| _ Patch Compile Tests _ |
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Ubuntu-11.0.23+9-post-Ubuntu-1ubuntu120.04.2  |
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Private Build-1.8.0_412-8u412-ga-1~20.04.1-b08  |
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   |||| _ Other Tests _ |
   | -1 :x: |  unit  | 191m 34s | 
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6929/10/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
 |  hadoop-hdfs in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 30s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 287m 51s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | 
hadoop.hdfs.server.namenode.TestFSNamesystemLockReport |
   
   
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   | GITHUB PR | https://github.com/apache/hadoop/pull/6929 |
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   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6929/10/testReport/ |
   | Max. process+thread count | 4401 (vs. ulimit of 5500) |
   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
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   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6929/10/console |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> Allow turn on both FSImage parallelization and compression
> ----------------------------------------------------------
>
>                 Key: HDFS-17573
>                 URL: https://issues.apache.org/jira/browse/HDFS-17573
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs, namenode
>    Affects Versions: 3.4.1
>            Reporter: Sungdong Kim
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.4.1, 3.5.0
>
>         Attachments: compressed-image-load-serial.png, 
> compressed-subsection-image-load-parallel.png, 
> compressed-subsection-image-load-serial.png
>
>
> The feature added HDFS-14617(in Improve FSImage load time by writing 
> sub-sections to the FSImage index. by [Stephen 
> O'Donnell|https://issues.apache.org/jira/secure/ViewProfile.jspa?name=sodonnell])
>  makes loading FSImage very faster.
>  
> But this option cannot be activated when turn on dfs.image.compress=true.
> In my opinion, larger clusters require both settings at the same time.
> For Example, the cluster I'm using has approximately 6 million file system 
> objects and FSImage is approximately 11GB with dfs.image.compress=true 
> setting.
> If turn off the dfs.image.compress option, it is expected to exceed 30GB, in 
> which case it will take a long time to move FSImage from standby to active 
> namenode using high network resource.
>  
> It was proved in this jira(HDFS-16147 by 
> [kinit|https://issues.apache.org/jira/secure/ViewProfile.jspa?name=mofei]) 
> that loading FSImage parallel and FSImage compression can be turned on at the 
> same time.  (And worked well on my environment also.)
> I created this new Jira and PR because the discussion in HDFS-16147 ended in 
> 2021, and I want it to be officially added in the next release, instead of 
> patch available.
> The actual code of the patch was written by 
> [kinit|https://issues.apache.org/jira/secure/ViewProfile.jspa?name=mofei] and 
> I resolved empty sub-section problem(see below comment of HDFS-16147) and 
> added test code.
> If this is not a proper method, please let me know another way to contribute.
> Thanks.



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