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Read and Write Consumed Capacity units are an abstract way of measuring Alternator actions. In general, they correspond to the read or write data. In the long run, the RCU/WCU adds a way of charging an operation and limiting usage. This series addresses two issues: consume capacity request API and metering. The Alternator (and DynmoDB) API has an optional parameter allowing users to check the number of units an operation consumes. When a user adds that parameter, the response will contain the number of units used for the operation. This series adds the consume capacity support to the get_item and put_item, adds a metric to collect the overall RCU and WCU used, and adds a test for the new functionality. Follow-up PRs will add support for more operations and GSI. Replaces #19811 Partially implement: #5027 Closes scylladb/scylladb#21543 * github.com:scylladb/scylladb: alternator/test_metrics: Add tests for table consumption units test_returnconsumedcapacity.py: Add putItem tests Alternator: add WCU support Add test/alternator/test_returnconsumedcapacity.py alternator/executor: Add consume capacity for get_item alsternator/stats: Add rcu and wcu metrics to stats alternator/executor.hh: white-space cleanup Add the consume_capacity helper class
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.