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This series introduces per-table metrics support for Alternator. It includes the following commits: Add optional per-table metrics for Alternator Introduces a shared_ptr-based mechanism that allows Alternator to register per-table metrics. These metrics follow the table's lifecycle, similar to how CQL metrics are handled. The use of shared_ptr ensures no direct dependency between table stats and Alternator. Enable registration of stats objects per table Adds support for registering a stats object using a keyspace and table name. Per-table metrics are prefixed with alternator_table to differentiate them from per-shard metrics. Metrics are reported once per node, and those not meaningful at the table level (e.g. create/delete) are excluded. All metrics use the skip_when_empty flag. Update per-table metrics handling Adds a helper function to retrieve the stats object from a table schema. Updates both per-shard and per-table metrics, resulting in some code duplication. Add tests for per-table metrics Extends existing tests to also validate the per-table metrics. These tests ensure that the new metrics are correctly registered and updated. This series improves observability in Alternator by enabling fine-grained per-table metrics without disrupting existing per-shard metrics. **No need to backport** Fixes #19824 Closes scylladb/scylladb#24046 * github.com:scylladb/scylladb: alternator/test_metrics.py: Test the per-table metrics alternator/executor.cc: Update per-table metrics alternator/stats: Add per-table metrics replica/database.hh: Add alternator per-table metrics alternator/stats.hh: Introduce a per-table stats container
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.