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https://issues.apache.org/jira/browse/HDFS-11604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15973795#comment-15973795
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Kai Zheng commented on HDFS-11604:
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Quick comments:
* {{PolicyLoader}} would be good to be {{ECPolicyLoader}}, as various policy
concepts in Hadoop;
* The template {{ec_policy_sample.xml}} file would be good to be here:
{{hadoop-hdfs-project/hadoop-hdfs/resources}};
* Can we move the policy parser/loader utility into this package in the client
module: {{hadoop-hdfs-project/hadoop-hdfs-client/o.a.h.hdfs.util}}
* A minor: "Load predefined ec policies from configuration file." => "Load user
defined ec policies from a XML configuration file."
* Minor: please avoid star/* imports.
> Define and parse erasure code codecs, schemas and policies
> ----------------------------------------------------------
>
> Key: HDFS-11604
> URL: https://issues.apache.org/jira/browse/HDFS-11604
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: erasure-coding
> Reporter: Kai Zheng
> Assignee: Lin Zeng
> Fix For: 3.0.0-alpha3
>
> Attachments: ec-config-sample.xml, ec-policy-config-sample-v2.xml,
> HDFS-11604-v1.patch, HDFS-11604-v2.patch, HDFS-11604-v3.patch,
> HDFS-11604-v4.patch
>
>
> According to recent discussions with [~andrew.wang] in HDFS-7337, it would be
> good to support allowing users to define their own erasure code codecs,
> schemas and policies via an XML file. The XML file can be passed to a CLI cmd
> to parse and send to NameNode to persist and maintain.
> Open this task to define the XML format providing a default sample file to
> put in the configuration folder for users' reference, and implement the
> necessary parser utility.
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