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https://issues.apache.org/jira/browse/HADOOP-14999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16250906#comment-16250906
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Genmao Yu commented on HADOOP-14999:
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pending on refactoring: move the {{TaskEngine}} from output stream to oss
filesystem .
Just as discussed in HADOOP-15027, I think
{{org.apache.hadoop.fs.s3a.SemaphoredDelegatingExecutor}} is a good common
class, and we may move it to hadoop-common.
Then, I will refactor the {{TaskEngine}} to use
{{SemaphoredDelegatingExecutor}}.
[[email protected]] Do you mind if I open jira to do this work?
> AliyunOSS: provide one asynchronous multi-part based uploading mechanism
> ------------------------------------------------------------------------
>
> Key: HADOOP-14999
> URL: https://issues.apache.org/jira/browse/HADOOP-14999
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/oss
> Affects Versions: 3.0.0-beta1
> Reporter: Genmao Yu
> Assignee: Genmao Yu
> Attachments: HADOOP-14999.001.patch, HADOOP-14999.002.patch
>
>
> This mechanism is designed for uploading file in parallel and asynchronously:
> - improve the performance of uploading file to OSS server. Firstly, this
> mechanism splits result to multiple small blocks and upload them in parallel.
> Then, getting result and uploading blocks are asynchronous.
> - avoid buffering too large result into local disk. To cite an extreme
> example, there is a task which will output 100GB or even larger, we may need
> to output this 100GB to local disk and then upload it. Sometimes, it is
> inefficient and limited to disk space.
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