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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15001) AliyunOSS: provide one memory-based buffering mechanism in outpustream to oss
Date Wed, 01 Nov 2017 13:50:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16234085#comment-16234085
] 

Steve Loughran commented on HADOOP-15001:
-----------------------------------------

Lessons of S3A here (HADOOP-13208 & predecessors?)

* easy for code to generate data faster than you can upload: needs ability to block writer
threads if the queue of pending uploads is too big. That's all writers using the same FS.
* off heap storage is potentially better, though unconstrained growth still an issue.

Look at {{S3ABlockOutputStream}} & helper classes


> AliyunOSS: provide one memory-based buffering mechanism in outpustream to oss
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-15001
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15001
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/oss
>    Affects Versions: 3.0.0-beta1
>            Reporter: Genmao Yu
>            Priority: Major
>




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