[ http://issues.apache.org/jira/browse/HADOOP-76?page=comments#action_12446162 ] Owen O'Malley commented on HADOOP-76: -------------------------------------
Since the dfs locking doesn't really work reliably, I would drop the tip id part of the directory structure, don't do any locking, and if the file is already in place, just skip that file. > Implement speculative re-execution of reduces > --------------------------------------------- > > Key: HADOOP-76 > URL: http://issues.apache.org/jira/browse/HADOOP-76 > Project: Hadoop > Issue Type: Improvement > Components: mapred > Affects Versions: 0.1.0 > Reporter: Doug Cutting > Assigned To: Sanjay Dahiya > Priority: Minor > Attachments: Hadoop-76.patch, spec_reducev.patch > > > As a first step, reduce task outputs should go to temporary files which are > renamed when the task completes. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
