# Last week in scylla-cluster-tests.git master (issue #85; 2025-03-07)

**URL:** <https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-85-2025-03-07/4583>\
**Category:** ScyllaDB\
**Tags:** git-testing-news\
**Created:** [March 7, 2025, 5:18pm UTC](https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-85-2025-03-07/4583 "2025-03-07T17:18:18Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![soyacz](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.scylladb.com/soyacz/32/557_2.png) [@soyacz](https://forum.scylladb.com/u/soyacz)\
**Post date:** [March 7, 2025, 5:18pm UTC](https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-85-2025-03-07/4583/1 "2025-03-07T17:18:18Z")

</div>

This short report brings to light some interesting commits to [scylla-cluster-tests.git master](https://github.com/scylladb/scylla-cluster-tests) from the last week.  
Commits in the 528b0a52…df2b91cf range are covered.

There were 38 non-merge commits from 15 authors in that period. Some notable commits:

Nemeses target only data nodes by default. Since most also apply to zero-token nodes (including config and schema changes), [both data and zero-token nodes are now explicitly set as nemesis targets.](https://github.com/scylladb/scylla-cluster-tests/commit/43a305803807cabf61582d8fff98d4f817f72e0d)

A [new job](https://github.com/scylladb/scylla-cluster-tests/commit/2840e11c5a45fcb43d08e8621fef5dfcbc262827) was added with four zero-token nodes to run all supported nemeses.

[All pip dependencies were updated.](https://github.com/scylladb/scylla-cluster-tests/commit/d5f7d58851094e74a9e01e8c0dcba19bdf89cb94)

A [templating mechanism for monitoring dashboards](https://github.com/scylladb/scylla-cluster-tests/commit/eab891577d32d160976c971f12b06cb9de4c4c81) was introduced, keeping SCT in sync with changes in the Scylla Monitoring repo.

Gemini [now supports log compression using ZSTD](https://github.com/scylladb/scylla-cluster-tests/commit/5be82a12e5cd0221f0545b43a811e040fd8a66cd), allowing longer runs without running out of disk space.

[Sanity jobs](https://github.com/scylladb/scylla-cluster-tests/commit/3be2eff847265e67fc680b52e2381424c65217e5) and [90% utilization tests](https://github.com/scylladb/scylla-cluster-tests/commit/79231cd4a0f5588e6845d705e83bf7d1a7628a9b) now use simulated racks for a more realistic testing environment.

Due to a [Grafana renderer issue](https://github.com/grafana/grafana/issues/82958), [monitoring was reverted to version 4.8.](https://github.com/scylladb/scylla-cluster-tests/commit/264782c3fe777cfd661fb1e613a375e3cb481cb9)

Performance test step durations can now be [configured using the `perf_gradual_step_duration` parameter](https://github.com/scylladb/scylla-cluster-tests/commit/98e830064dcff5fbe201c845beba332756d3c7e5), making it easier to modify predefined step lengths. This was used in a [new Java driver performance test.](https://github.com/scylladb/scylla-cluster-tests/commit/5578a5f5d23e3979d2316905ba6a065aa55c2aae)

The `modify_table_twcs_window_size` nemesis was [refactored](https://github.com/scylladb/scylla-cluster-tests/commit/7e6b39c267b1d569799d6e4fd9eff9ec5a28c71a) and now tests TWCS borders across wider ranges.

Performance regression tests now [respect the `pre_create_keyspace` parameter](https://github.com/scylladb/scylla-cluster-tests/commit/df2b91cf44a90707c44335553670ed718b292ce3), allowing easier configuration of the initial number of tablets.

See you in the next issue of last week in scylla-cluster-tests.git master!