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Kai Zheng commented on HDFS-7866: --------------------------------- bq. If we want to support custom policies later, we still need a way to generate unique IDs right? I agree we can do the simpler approach here to move on. Later (maybe in a long future) we can think about how to customize an EC policy where there is real system requirement. Also please ref. [the comment made by Andrew here|https://issues.apache.org/jira/browse/HDFS-7337?focusedCommentId=14632005&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14632005]. > Erasure coding: NameNode manages multiple erasure coding policies > ----------------------------------------------------------------- > > Key: HDFS-7866 > URL: https://issues.apache.org/jira/browse/HDFS-7866 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Kai Zheng > Assignee: Rui Li > Attachments: HDFS-7866-v1.patch, HDFS-7866-v2.patch, > HDFS-7866-v3.patch, HDFS-7866.4.patch, HDFS-7866.5.patch, HDFS-7866.6.patch, > HDFS-7866.7.patch > > > This is to extend NameNode to load, list and sync predefine EC schemas in > authorized and controlled approach. The provided facilities will be used to > implement DFSAdmin commands so admin can list available EC schemas, then > could choose some of them for target EC zones. -- This message was sent by Atlassian JIRA (v6.3.4#6332)