You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@cassandra.apache.org by "Robert Stupp (JIRA)" <ji...@apache.org> on 2014/08/03 17:25:11 UTC
[jira] [Created] (CASSANDRA-7679) Batch DDL
Robert Stupp created CASSANDRA-7679:
---------------------------------------
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.
--
This message was sent by Atlassian JIRA
(v6.2#6252)