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Hudson commented on HDFS-1520: ------------------------------ Integrated in Hadoop-Hdfs-22-branch #66 (See [https://builds.apache.org/job/Hadoop-Hdfs-22-branch/66/]) > HDFS 20 append: Lightweight NameNode operation to trigger lease recovery > ------------------------------------------------------------------------ > > Key: HDFS-1520 > URL: https://issues.apache.org/jira/browse/HDFS-1520 > Project: Hadoop HDFS > Issue Type: New Feature > Components: name-node > Affects Versions: 0.20-append > Reporter: Hairong Kuang > Assignee: Hairong Kuang > Fix For: 0.20-append > > Attachments: recoverLeaseApache20.patch > > > Currently HBase uses append to trigger the close of HLog during Hlog split. > Append is a very expensive operation, which involves not only NameNode > operations but creating a writing pipeline. If one of datanodes on the > pipeline has a problem, this recovery may takes minutes. I'd like implement a > lightweight NameNode operation to trigger lease recovery and make HBase to > use this instead. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira