[HDFS-10994] Support an XOR policy XOR-2-1-64k in HDFS

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha2
• Component/s: erasure-coding
• Labels: hdfs-ec-3.0-must-do
• Hadoop Flags: Reviewed

Release Note

This introduced a new erasure coding policy named XOR-2-1-64k using the simple XOR codec, and it can be used to evaluate HDFS erasure coding feature in a small cluster (only 2 + 1 datanodes needed). The policy isn't recommended to be used in a production cluster.

• Assignee: Sammi Chen
• Reporter: Sammi Chen
• Created: 11/Oct/16 03:17
• Updated: 30/Nov/16 08:20
• Resolved: 28/Nov/16 06:40

Description

So far, "hdfs erasurecode" command supports three policies, RS-DEFAULT-3-2-64k, RS-DEFAULT-6-3-64k and RS-LEGACY-6-3-64k. This task is going to add XOR-2-1-64k policy to this command.