The cdc_topology_description table will be used internally
by nodes to send new CDC stream generations to other nodes.
The cdc_description table is a user-facing table,
used to inform users about new sets of CDC streams.
Regenerate sstables and digests for schema_change_test.
We don't need to protect this change by a schema feature:
when a node creates these tables, it announces them
to all other nodes. If schema agreement happens before
this migration, all nodes will use a digest calculated
without these tables. If it happens after, then all nodes
will eventually know about these tables and use a digest
calculated with these tables.
This patch introduces a distributed system keyspace, used to hold
system tables that need to be replicated across a set of replicas
(that is, can't use the LocalStrategy).
In following patches, we will use this keyspace to hold a table
containing view building status updates for each node, used to support
range movements and a new nodetool command.
Fixes#3237
Signed-off-by: Duarte Nunes <duarte@scylladb.com>
