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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14266) S3Guard: S3AFileSystem::listFiles() to employ MetadataStore
Date Mon, 03 Apr 2017 17:04:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953827#comment-15953827
] 

Steve Loughran commented on HADOOP-14266:
-----------------------------------------

This may be fastest first just to revert to an incremental tree walk. What I Don't want to
have happen is people being told not to use this call, because it delivers such a great speedup
for raw S3; you can't even attempt a {{listFiles("s3a:://landsat-pds/", true)}} in Hadoop
2.7 without the code appearing to hang, there are too many objects in that bucket for it to
handle.

> S3Guard: S3AFileSystem::listFiles() to employ MetadataStore
> -----------------------------------------------------------
>
>                 Key: HADOOP-14266
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14266
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Mingliang Liu
>
> Similar to [HADOOP-13926], this is to track the effort of employing MetadataStore in
{{S3AFileSystem::listFiles()}}.



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