Andrew Wang commented on HDFS-7674:

Thanks [~Sammi]!

> [umbrella] 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: Li Bo
> 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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