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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-7697) UDF use new schema migration
Date Tue, 05 Aug 2014 19:58:13 GMT
Robert Stupp created CASSANDRA-7697:
---------------------------------------

             Summary: UDF use new schema migration
                 Key: CASSANDRA-7697
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7697
             Project: Cassandra
          Issue Type: Bug
            Reporter: Robert Stupp
            Assignee: Robert Stupp
             Fix For: 3.0


UDF is the "prototype candidate" for new, fine granular schema migration.

On the basic level, everything stays the same, more or less, except:

# We might use separate versioning for migration messages (in addition to the messaging version)
# For DROP X changes, we only encode what's necessary (the keyspace name, the table name,
the timestamp). Not to save bytes, but to avoid going through a full schema merge on the node.
# Include the type of change with all other schema changes, for the same reason.
# For schema pulls, use a merkle tree or something similar, to only pull/apply the relevant
changes.




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