[HDFS-11598] Improve -setrep for Erasure Coded files

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha4
• Component/s: shell
• Labels: hdfs-ec-3.0-nice-to-have
• Target Version/s: 3.0.0-beta1
• Hadoop Flags: Reviewed
• Assignee: Yiqun Lin
• Reporter: Wei-Chiu Chuang
• Created: 30/Mar/17 17:38
• Updated: 17/Apr/17 15:40
• Resolved: 03/Apr/17 14:58

Description

Quoting my comments in HDFS-10974:

Looking at code again, I think we can improve the handling of EC files better:

• In SetReplication#processPath, can we check if the file is EC before invoking setReplication() on it?
• -setrep also has a command switch -w to wait for the file to be replicated. Can we ignore this if the file is erasure coded?

Also, in fact, -setrep only make sense for HDFS file system...