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https://issues.apache.org/jira/browse/HADOOP-12065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14937647#comment-14937647
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Hudson commented on HADOOP-12065:
---------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #1203 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/1203/])
HADOOP-12065 Using more meaningful keys in EC schema. Contributed by Kai
(kai.zheng: rev c41b02cc0058239657263d45d969e71b14e6a589)
* hadoop-common-project/hadoop-common/CHANGES-HDFS-EC-7285.txt
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/TestSchemaLoader.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/ECSchema.java
> Using more meaningful keys in EC schema
> ---------------------------------------
>
> Key: HADOOP-12065
> URL: https://issues.apache.org/jira/browse/HADOOP-12065
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io
> Reporter: Kai Zheng
> Assignee: Kai Zheng
> Attachments: HADOOP-12065-HDFS-7285-v1.patch
>
>
> Commented by [~szetszwo] in HADOOP-12029:
> bq. We should also change "k" and "m" in the following to something like
> "numDataUnits" and "numParityUnits".
> {code}
> public static final String NUM_DATA_UNITS_KEY = "k";
> public static final String NUM_PARITY_UNITS_KEY = "m";
> {code}
> This sounds good to me, as in fact in many erasure coding related papers,
> discussions, and implementations, though {{k}} and {{m}} are broadly used,
> the meanings are not consistent. For example, {{m}} can also mean
> {{numDataUnits + numParityUnits}}, all the rows in the coding matrix. The
> suggested names are more clear and explicit.
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