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https://issues.apache.org/jira/browse/HADOOP-18435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17600957#comment-17600957
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Mukund Thakur commented on HADOOP-18435:
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Yes it will be used in future for Vectored IO stuff. Jira here 
https://issues.apache.org/jira/browse/HADOOP-18347

 

> Remove usage of fs.s3a.executor.capacity
> ----------------------------------------
>
>                 Key: HADOOP-18435
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18435
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>            Reporter: Viraj Jasani
>            Assignee: Viraj Jasani
>            Priority: Major
>
> When s3guard was part of s3a, DynamoDBMetadataStore was the only consumer of 
> StoreContext that used throttled executor provided by StoreContext, which 
> internally uses fs.s3a.executor.capacity to determine executor capacity for 
> SemaphoredDelegatingExecutor. With the removal of s3guard from s3a, we should 
> also remove fs.s3a.executor.capacity and it's usages as it's no longer being 
> used by any StoreContext consumers. The config's existence and its 
> description can be really confusing for the users.



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