[HADOOP-11550] Enhance ErasureCoder API to support multiple encoding/decoding steps

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Kai Zheng
• Reporter: Kai Zheng
• Created: 05/Feb/15 08:57
• Updated: 31/Jul/16 14:19

Description

In HADOOP-11646, ErasureCoder API is defined to support encoding/decoding of a block group considering the most simple but often case that only one coding step is involved. This is to enhance the API to support complex cases requiring multiple steps for encoding/decoding of a block group.

Recovering parity blocks will be supported here also, because it involves at least two steps: step 1. recover data blocks first; step2. call encoder to compute the erased parity blocks with all the ready data blocks.

Issue Links

• is part of: HADOOP-11646 Erasure Coder API for encoding and decoding of block group