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Jiandan Yang commented on HDFS-12390: -------------------------------------- [~aw] Rewriting the script to Java will not starts child process? Could you give me more details? > Support to refresh DNS to switch mapping > ---------------------------------------- > > Key: HDFS-12390 > URL: https://issues.apache.org/jira/browse/HDFS-12390 > Project: Hadoop HDFS > Issue Type: New Feature > Components: hdfs, hdfs-client > Reporter: Jiandan Yang > Assignee: Jiandan Yang > Attachments: HDFS-12390.001.patch, HDFS-12390.002.patch, > HDFS-12390-branch-2.8.2.001.patch > > > As described in > [HDFS-12200|https://issues.apache.org/jira/browse/HDFS-12200], > ScriptBasedMapping may lead to NN cpu 100%. ScriptBasedMapping run > sub_processor to get rack info of DN/Client, so we think it's a little > heavy. We prepare to use TableMappingļ¼but TableMapping does not support > refresh and can not reload rack info of newly added DataNodes. > So we implement refreshDNSToSwitch in dfsadmin. -- 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