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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7337) Configurable and pluggable Erasure Codec and schema
Date Fri, 23 Jan 2015 08:37:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14288973#comment-14288973
] 

Kai Zheng commented on HDFS-7337:
---------------------------------

As discussed, most part of this source codes will be moved to hadoop-common side, but I'm
not sure if it's OK to still use these JIRA entries that start with HDFS, instead of HADOOP.

Would anyone help confirm this ? It would be great if we don't have to change, it's reasonable
because it does work for HDFS, although for other considerations we'd better move over there.

> Configurable and pluggable Erasure Codec and schema
> ---------------------------------------------------
>
>                 Key: HDFS-7337
>                 URL: https://issues.apache.org/jira/browse/HDFS-7337
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Zhe Zhang
>            Assignee: Kai Zheng
>         Attachments: HDFS-7337-prototype-v1.patch, HDFS-7337-prototype-v2.zip, HDFS-7337-prototype-v3.zip,
PluggableErasureCodec.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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