[HDFS-11604] Define and parse erasure code policies

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha4
• Component/s: erasure-coding
• Hadoop Flags: Reviewed
• Assignee: Frank Zeng
• Reporter: Kai Zheng
• Created: 31/Mar/17 07:00
• Updated: 21/Apr/17 05:58
• Resolved: 21/Apr/17 05:36

Description

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.