Yi Liu created HADOOP-11961:
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Summary: Add isLinear interface to Erasure coder
Key: HADOOP-11961
URL: https://issues.apache.org/jira/browse/HADOOP-11961
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Yi Liu
Assignee: Yi Liu
Today, we have a discussion including [~zhz], [~drankye], etc., also discuss in
HDFS-8347.
Some coder like {{RS}} and {{XOR}} is linear, some have coding boundary like
HitchHicker. If the coder is linear, we can decode at any size, and we don't
need to padding inputs to *chunksize*, if the coder is not linear, the inputs
need to padding to *chunksize*, then do decode.
This interface is important for performance, and can save memory/disk space
since the parity cells are the same as first data cell (less than codec
chunksize).
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