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https://issues.apache.org/jira/browse/HDFS-9924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HDFS-9924:
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Attachment: HDFS-9924-POC.patch
A simple rpc client built on netty. Test mkdirs and getFileInfo in
TestAsyncDFSClient. Used to prove that option 3 can work.
https://github.com/Apache9/hadoop/commit/aa1623c426ee97398089ba15496651119a1672a9
> [umbrella] Nonblocking HDFS Access
> ----------------------------------
>
> Key: HDFS-9924
> URL: https://issues.apache.org/jira/browse/HDFS-9924
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: fs
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Xiaobing Zhou
> Attachments: AsyncHdfs20160510.pdf,
> Async-HDFS-Performance-Report.pdf, HDFS-9924-POC.patch
>
>
> This is an umbrella JIRA for supporting Nonblocking HDFS Access.
> Currently, all the API methods are blocking calls -- the caller is blocked
> until the method returns. It is very slow if a client makes a large number
> of independent calls in a single thread since each call has to wait until the
> previous call is finished. It is inefficient if a client needs to create a
> large number of threads to invoke the calls.
> We propose adding a new API to support nonblocking calls, i.e. the caller is
> not blocked. The methods in the new API immediately return a Java Future
> object. The return value can be obtained by the usual Future.get() method.
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