0fe8bdd0db
And use a temporary vector to use the precalculated distances. A later patch will add some randomization to shuffle nodes at the same distance from the reference node. This improves the function performance by 50% for 3 replicas, from 77.4 ns to 39.2 ns, larger replica sets show greater improvement (over 4X for 15 nodes): Before: test iterations median mad min max allocs tasks inst cycles sort_by_proximity_topology.perf_sort_by_proximity 12808773 77.368ns 0.062ns 77.300ns 77.873ns 0.000 0.000 1194.2 231.6 After: sort_by_proximity_topology.perf_sort_by_proximity 25541973 39.225ns 0.114ns 38.966ns 39.339ns 0.000 0.000 588.5 116.6 Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
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.