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Andrew Wang commented on HADOOP-11798: -------------------------------------- I think this one is pretty important for XOR performance. [~drankye], related question, do we have an EC policy for XOR? This would be nice for small clusters, since right now the smallest stripe width is (3,2) which requires at least 5 racks. An XOR (2,1) would only require 3. > Native raw erasure coder in XOR codes > ------------------------------------- > > Key: HADOOP-11798 > URL: https://issues.apache.org/jira/browse/HADOOP-11798 > Project: Hadoop Common > Issue Type: Sub-task > Components: io > Reporter: Kai Zheng > Assignee: Kai Zheng > Labels: hdfs-ec-3.0-must-do > Fix For: HDFS-7285 > > Attachments: HADOOP-11798-v1.patch > > > Raw XOR coder is utilized in Reed-Solomon erasure coder in an optimization to > recover only one erased block which is in most often case. It can also be > used in HitchHiker coder. Therefore a native implementation of it would be > deserved for performance gain. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org