b71762d5da
For counter updates, use a counter ID that is constructed from the node's rack instead of the node's host ID. A rack can have at most two active tablet replicas at a time: a single normal tablet replica, and during tablet migration there are two active replicas, the normal and pending replica. Therefore we can have two unique counter IDs per rack that are reused by all replicas in the rack. We construct the counter ID from the rack UUID, which is constructed from the name "dc:rack". The pending replica uses a deterministic variation of the rack's counter ID by negating it. This improves the performance and size of counter cells by having less unique counter IDs and less counter shards in a counter cell. Previously the number of counter shards was the number of different host_id's that updated the counter, which can be typically the number of nodes in the cluster and continue growing indefinitely when nodes are replaced. with the rack-based counter id the number of counter shards will be at most twice the number of different racks (including removed racks, which should not be significant). Fixes SCYLLADB-356
Scylla in-source tests.
For details on how to run the tests, see docs/dev/testing.md
Shared C++ utils, libraries are in lib/, for Python - pylib/
alternator - Python tests which connect to a single server and use the DynamoDB API unit, boost, raft - unit tests in C++ cqlpy - Python tests which connect to a single server and use CQL topology* - tests that set up clusters and add/remove nodes cql - approval tests that use CQL and pre-recorded output rest_api - tests for Scylla REST API Port 9000 scylla-gdb - tests for scylla-gdb.py helper script nodetool - tests for C++ implementation of nodetool
If you can use an existing folder, consider adding your test to it. New folders should be used for new large categories/subsystems, or when the test environment is significantly different from some existing suite, e.g. you plan to start scylladb with different configuration, and you intend to add many tests and would like them to reuse an existing Scylla cluster (clusters can be reused for tests within the same folder).
To add a new folder, create a new directory, and then
copy & edit its suite.ini.