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This flag was added to operations which have an --output-dir command-line arguments. These operations write sstables and need a directory where to write them. Back in the numeric-generation world this posed a problem: if the directory contained any sstable, generation clash was almost guaranteed, because each scylla-sstable command invokation would start output generations from 1. To avoid this, empty output directory was a requirement, with the --unsafe-accept-nonempty-output-dir allowing for a force-override. Now in the timeuuid generation days, all this is not necessary anymore: generations are unique, so it is not a problem if the output directory already contains sstables: the probability of generation clash is almost 0. Even if it happens, the tool will just simply fail to write the new sstable with the clashing generation. Remove this historic relic of a flag and the related logic, it is just a pointless nuissance nowadays.
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.