[ https://issues.apache.org/jira/browse/HDFS-1520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jitendra Nath Pandey updated HDFS-1520: --------------------------------------- Attachment: HDFS-1520.20-security.1.patch Patch for 20-security. > 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: HDFS-1520.20-security.1.patch, 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