[jira] [Commented] (HADOOP-18399) SingleFilePerBlockCache to use LocalDirAllocator for file allocatoin

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-18399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17621407#comment-17621407 ] 

ASF GitHub Bot commented on HADOOP-18399:
-----------------------------------------

virajjasani commented on PR #5054:
URL: https://github.com/apache/hadoop/pull/5054#issuecomment-1286270467

   Tested against `us-west-2` with:
   
   `mvn -Dparallel-tests -DtestsThreadCount=8 -Dscale clean verify`
   
   and
   
   `mvn -Dparallel-tests -DtestsThreadCount=8 -Dprefetch -Dscale clean verify`




> SingleFilePerBlockCache to use LocalDirAllocator for file allocatoin
> --------------------------------------------------------------------
>
>                 Key: HADOOP-18399
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18399
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.4.0
>            Reporter: Steve Loughran
>            Assignee: Viraj Jasani
>            Priority: Major
>
> prefetching stream's SingleFilePerBlockCache uses Files.tempFile() to allocate a temp file.
> it should be using LocalDirAllocator to allocate space from a list of dirs, taking a config key to use. for s3a we will use the Constants.BUFFER_DIR option, which on yarn deployments is fixed under the env.LOCAL_DIR path, so automatically cleaned up on container exit



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