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https://issues.apache.org/jira/browse/HDFS-7337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15944070#comment-15944070
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Andrew Wang commented on HDFS-7337:
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Hi Kai, glad the suggestion was helpful,
bq. Do you think we should allow removing of schema/policy by this XML means?
IMO, the XML file is only for new entries. Extra CLI command could be provided
to do removal. When do removal, codec/schema/policy name would be used to
distinguish and reference the entry to remove? No update is supported, since
admins can remove and then add.
Agree, sounds good to me. Thanks again for driving this!
> Configurable and pluggable Erasure Codec and schema
> ---------------------------------------------------
>
> Key: HDFS-7337
> URL: https://issues.apache.org/jira/browse/HDFS-7337
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: erasure-coding
> Reporter: Zhe Zhang
> Assignee: Kai Zheng
> Labels: hdfs-ec-3.0-nice-to-have
> Attachments: HDFS-7337-prototype-v1.patch,
> HDFS-7337-prototype-v2.zip, HDFS-7337-prototype-v3.zip,
> PluggableErasureCodec.pdf, PluggableErasureCodec-v2.pdf,
> PluggableErasureCodec-v3.pdf
>
>
> According to HDFS-7285 and the design, this considers to support multiple
> Erasure Codecs via pluggable approach. It allows to define and configure
> multiple codec schemas with different coding algorithms and parameters. The
> resultant codec schemas can be utilized and specified via command tool for
> different file folders. While design and implement such pluggable framework,
> it’s also to implement a concrete codec by default (Reed Solomon) to prove
> the framework is useful and workable. Separate JIRA could be opened for the
> RS codec implementation.
> Note HDFS-7353 will focus on the very low level codec API and implementation
> to make concrete vendor libraries transparent to the upper layer. This JIRA
> focuses on high level stuffs that interact with configuration, schema and etc.
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