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ecd122a1b0
In this patch series we add an implementation of an expiration service to Alternator, which periodically scans the data in the table, looking for expired items and deleting them. We also continue to improve the TTL test suite to cover additional corner cases discovered during the development of the code. This implementation is good enough to make all existing tests but one, plus a few new ones, pass, but is still a very partial and inefficient implementation littered with FIXMEs throughout the code. Among other things, this initial implementation doesn't do anything reasonable about pacing of the scan or about multiple tables, it scans entire items instead of only the needed parts, and because each shard "owns" a different subset of the token ranges, if a node goes down, partitions which it "owns" will not get expired. The current tests cannot expose these problems, so we will need to develop additional tests for them. Because this implementation is very partial, the Alternator TTL continues to remain "experimental", cannot be used without explicitly enabling this experimental feature, and must not be used for any important deployment. Refs #5060 but doesn't close the issue (let's not close it until we have a reasonably complete implementation - not this partial one). Closes #9624 * github.com:scylladb/scylla: alternator: fix TTL expiration scanner's handling of floating point test/alternator: add TTL test for more data test/alternator: remove "xfail" tag from passing tests in test_ttl.py test/alternator: make test_ttl.py tests fast on Alternator alternator: initial implmentation of TTL expiration service alternator: add another unwrap_number() variant alternator: add find_tag() function test/alternator: test another corner case of TTL setting test/alternator: test TTL expiration for table with sort key test/alternator: improve basic test for TTL expiration test/alternator: extract is_aws() function