[ https://issues.apache.org/jira/browse/HDFS-15059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yang Yun updated HDFS-15059: ---------------------------- Attachment: HDFS-15059.patch Status: Patch Available (was: Open) > Cache finalized replica info during datanode shutdown for fast restarting > ------------------------------------------------------------------------- > > Key: HDFS-15059 > URL: https://issues.apache.org/jira/browse/HDFS-15059 > Project: Hadoop HDFS > Issue Type: Improvement > Components: datanode > Reporter: Yang Yun > Assignee: Yang Yun > Priority: Minor > Attachments: HDFS-15059.patch > > > HDFS-7928 persist the whole volume map on the disk and let the datanode read > that file and create the volume map during startup. This significantly > improve the datanode startup time. > But it not works for any cases. For example, if datanode is killed, it's no > chance to save the volume map. > Add a shutdown hook to make sure the volume map is saved during shutdown. > If the datanode is terminated by kill or other methods, we only reload the > finalized replca from cache. It's is safe because the DirectoryScanner will > run soon to correct possible missmatch. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org