Coprocessors: Colocate arbitrary code with regions
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Key: HBASE-2001
URL: https://issues.apache.org/jira/browse/HBASE-2001
Project: Hadoop HBase
Issue Type: Sub-task
Reporter: Andrew Purtell
Assignee: Andrew Purtell
"Support arbitrary code that runs run next to each region in table. As regions
split and move, coprocessor code should automatically move also."
Use classloader which looks on HDFS.
Associate a list of classes to load with each table. Put this in HRI so it
inherits from table but can be changed on a per region basis (so then those
region specific changes can inherited by daughters).
Not completely arbitrary code, should require implementation of an interface
with callbacks for:
* Open
* Close
* Split
* Compact
* (Multi)get and scanner next()
* (Multi)put
* (Multi)delete
Add method to HRegionInterface for invoking coprocessor methods and retrieving
results.
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