luoge123 created HDFS-12555: ------------------------------- Summary: HDFS federation should support configure secondary directory Key: HDFS-12555 URL: https://issues.apache.org/jira/browse/HDFS-12555 Project: Hadoop HDFS Issue Type: Improvement Components: federation Reporter: luoge123
HDFS federation support multiple namenodes horizontally scales the file system namespace. As the amount of data grows, using a single group of namenodes to manage a single directory, namenode still achieves performance bottlenecks. In order to reduce the pressure of namenode, we can split out the secondary directory, and manager it by a new namenode. This is transparent for users. For example, nn1 only manager the /user directory, when nn1 achieve performance bottlenecks, we can split out /user/hive directory, and ues nn2 to manager it. That means core-site.xml should support as follows configuration. <property> <name>fs.viewfs.mounttable.nsX.link./user</name> <value>hdfs://nn1:8020/user</value> </property> <property> <name>fs.viewfs.mounttable.nsX.link./user/hive</name> <value>hdfs://nn2:8020/user/hive</value> </property> -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org