Artsiom Mishuta

Created new experimental nemesis AddDropTableMonkey for doing add/drop table in parallel and very fast scylla issue: scylladb/scylladb#7620 ## PR pre-checks (self review) - [ ] I followed [KISS principle](https://en.wikipedia.org/wiki/KISS_principle) and...

add commit log test accorting to doc: https://docs.google.com/document/d/1fI0JnlH7RNjXY_LRor07_P2vy1nvzEHD83oUXfM0qjA ## PR pre-checks (self review) - [ ] I followed [KISS principle](https://en.wikipedia.org/wiki/KISS_principle) and [best practices](https://docs.google.com/document/d/1jihgOKb5iGRlD8_HQ92O0JbLk1kASUoZT23i_MXFSKI) - [ ] I didn't leave commented-out/debugging...

test(ParallelAddDropColumnMonkey): new nemesis

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Created new experimental nemesis ParallelAddDropColumnMonkey for doing add/drop columns in parallel and per columns. Nemesis sends commands in parallel through 2 separate BD sessions that reuses during the whole nemesis...

the idea is to test the hardest case - modifying a column that is a regular column in the base table, but in the materialized view is one of the...

Common SCT test for MV/CDC/LWT with tablets

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idea: create test to verify how MV/LWT/CDC features behave in a cluster where tablet migration/split/merge happens constantly initial LWT PR: https://github.com/scylladb/scylla-cluster-tests/pull/11517

decrease MAX_ALLOWED_SERVICE_LEVELS from 8 to 7 due to error: "Can't create service level - no more scheduling groups exist" and due to https://github.com/scylladb/scylladb/issues/21051 closed as not planed ### Testing -...