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https://issues.apache.org/jira/browse/HDFS-11604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15974034#comment-15974034
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Rakesh R commented on HDFS-11604:
---------------------------------
Thanks [~zenglinx] for the good work. Sorry for pitch in late, I've few
comments,
# Please add {{@InterfaceAudience.Private}} to {{public class ECPolicyLoader}}
# Probably we could add {{layout version}} in {{c_policy_sample.xml}}. Later,
this will help if there is any modification to the policy or schema, right?
{code}
<layoutversion>int_value</layoutversion>
{code}
# Please combine multiple Java exceptions in the same catch clause like,
{code}
} catch (ParserConfigurationException | IOException | SAXException e) {
throw new RuntimeException("Failed to load policy file: " + policyFile);
}
{code}
# Adding a reminder, need to capture this new behavior in [HDFS Erasure Coding
doc
section|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html].
> 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, HDFS-11604-v5.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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