Jean-Daniel Cryans created HBASE-9898:
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Summary: Have a way to set a different default compression on HCD
Key: HBASE-9898
URL: https://issues.apache.org/jira/browse/HBASE-9898
Project: HBase
Issue Type: Improvement
Reporter: Jean-Daniel Cryans
Fix For: 0.98.0
I was exploring if there would be a nice way to set the compression by default
to a different algorithm but I didn't find any that I can implement right now,
dumping my ideas so that others can chime in.
I think the best place to take it into account would be on the master's side.
Basically you run a check when creating a new table to see if compression
wasn't set, and if so then set it to the new default. The important thing is
you don't want to replace NONE, because that might be the user's goal to set it
like that.
The main problem is that the normal HCD constructor calls the deprecated
constructor that sets most of the properties to their defaults, including
compression, which means that it will always be NONE instead of null.
It appears that this constructor has been deprecated since February 2012
(https://github.com/apache/hbase/blame/0.94/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java#L292)
so maybe we can remove it in the next major version and make our life easier?
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