Robert Stupp created CASSANDRA-7679:
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Summary: Batch DDL
Key: CASSANDRA-7679
URL: https://issues.apache.org/jira/browse/CASSANDRA-7679
Project: Cassandra
Issue Type: Improvement
Reporter: Robert Stupp
Just an idea: To improve speed of DDL in clusters with lots of
Keyspaces/Tables/Columns it might help to collect a bunch of schema changes and
propagate them as a single bunch of changes.
Such a DDL batch would
# execute DDLs locally and collect all mutations
# broadcast all mutations at once
# schema agreement
# return list<SchemaChange> via native protocol to the client
So {{DefsTables.mergeSchemaInternal}} (which seems to be the expensive part)
would only execute once per DDL batch on each node.
DDL batches would not be atomic.
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