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Jakob Homan commented on HDFS-1071: ----------------------------------- Also, in TestParallelImageWrite.java, there is an unused import (URI) and an unused local variable (imageIndex) that should be cleaned up. > savenamespace should write the fsimage to all configured fs.name.dir in > parallel > -------------------------------------------------------------------------------- > > Key: HDFS-1071 > URL: https://issues.apache.org/jira/browse/HDFS-1071 > Project: Hadoop HDFS > Issue Type: Improvement > Components: name-node > Reporter: dhruba borthakur > Assignee: Dmytro Molkov > Attachments: HDFS-1071.2.patch, HDFS-1071.3.patch, HDFS-1071.4.patch, > HDFS-1071.5.patch, HDFS-1071.6.patch, HDFS-1071.patch > > > If you have a large number of files in HDFS, the fsimage file is very big. > When the namenode restarts, it writes a copy of the fsimage to all > directories configured in fs.name.dir. This takes a long time, especially if > there are many directories in fs.name.dir. Make the NN write the fsimage to > all these directories in parallel. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.