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Whereas DynamoDB limits the names of tables, LSIs and GSIs to 255 characters each, Alternator currently has different (and lower) limitations: 1. A table name must be up to 222 characters. 2. For a GSI, the sum of the table's and GSI's name length, plus 1, must be up to 222 characters. 3. For an LSI, the sum of the table's and LSI's name length, plus 2, must be up to 222 characters. The first patch documents these existing limitations, improves their testing, and fixes a tiny bug found by one of the tests (where UpdateTable adding a GSI's limit testing is off by one). The second patch unfortunately shows with a reproducer (issue #24598) this limit of 222 is problematic and we may need to lower it: If a user creates a table of length 222 and then enables Alternator streams, Scylla shuts down on an IO error. This will need to be fixed later, but at least this patch properly documents the existing behavior. No need to backport this patch - it is a very minor improvement that it is unlikely users care about and there is no potential for harm. Closes scylladb/scylladb#24597 * github.com:scylladb/scylladb: test/alternator: reproducer for streams bug with long table name alternator: improve, document and test table/index name lengths
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.