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Posted to hdfs-dev@hadoop.apache.org by "Kai Zheng (JIRA)" <ji...@apache.org> on 2015/01/24 11:28:34 UTC

[jira] [Created] (HDFS-7674) Adding metrics for Erasure Coding

Kai Zheng created HDFS-7674:
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             Summary: Adding metrics for Erasure Coding
                 Key: HDFS-7674
                 URL: https://issues.apache.org/jira/browse/HDFS-7674
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Kai Zheng
            Assignee: Kai Zheng


As the design (in HDFS-7285) indicates, erasure coding involves non-trivial impact and workload for NameNode, DataNode and client; it also allows configurable and pluggable erasure codec and schema with flexible tradeoff options (see HDFS-7337). To support necessary analysis and adjustment, we'd better have various meaningful metrics for the EC support, like encoding/decoding tasks, recovered blocks, read/transferred data size, computation time and etc.



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