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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7674) Adding metrics for Erasure Coding
Date Sat, 24 Jan 2015 10:28:34 GMT
Kai Zheng created HDFS-7674:

             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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