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Andrew Wang commented on HDFS-9924: ----------------------------------- I've gone ahead and moved the commits for AsyncFileSystem and TestAsyncDFS to a new HDFS-9924 branch. I checked that this branch is identical to the previous state of trunk before the reverts, and updated the fix versions of related JIRAs. Compile tested all the branches. Here's the list of commits, also should be findable via JIRA query for HDFS-9924 fix version: {quote} HDFS-10224 HADOOP-12957 HDFS-10346 HADOOP-13168 HDFS-10390 HDFS-10431 HDFS-10430 HADOOP-13226 {quote} > [umbrella] Asynchronous 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 > > > This is an umbrella JIRA for supporting Asynchronous 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 asynchronous 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org