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e74a4b038f
This change supports changing replication factor in tablets-enabled keyspaces. This covers both increasing and decreasing the number of tablets replicas through first building topology mutations (`alter_keyspace_statement.cc`) and then tablets/topology/schema mutations (`topology_coordinator.cc`). For the limitations of the current solution, please see the docs changes attached to this PR. Fixes: #16129 Closes scylladb/scylladb#16723 * github.com:scylladb/scylladb: test: Do not check tablets mutations on nodes that don't have them test: Fix the way tablets RF-change test parses mutation_fragments test/tablets: Unmark RF-changing test with xfail docs: document ALTER KEYSPACE with tablets Return response only when tablets are reallocated cql-pytest: Verify RF is changes by at most 1 when tablets on cql3/alter_keyspace_statement: Do not allow for change of RF by more than 1 Reject ALTER with 'replication_factor' tag Implement ALTER tablets KEYSPACE statement support Parameterize migration_manager::announce by type to allow executing different raft commands Introduce TABLET_KEYSPACE event to differentiate processing path of a vnode vs tablets ks Extend system.topology with 3 new columns to store data required to process alter ks global topo req Allow query_processor to check if global topo queue is empty Introduce new global topo `keyspace_rf_change` req New raft cmd for both schema & topo changes Add storage service to query processor tablets: tests for adding/removing replicas tablet_allocator: make load_balancer_stats_manager configurable by name
Scylla developer documentation
This folder contains developer-oriented documentation concerning the ScyllaDB codebase. We also have a wiki, which contains additional developer-oriented documentation. There is currently no clear definition of what goes where, so when looking for something be sure to check both.
Seastar documentation can be found here.
User documentation can be found on docs.scylladb.com
For information on how to build Scylla and how to contribute visit HACKING.md and CONTRIBUTING.md.