# Last week in scylla-cluster-tests.git master (issue #144; 2026-07-10)

**URL:** <https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-144-2026-07-10/5431>\
**Category:** ScyllaDB\
**Tags:** git-testing-news\
**Created:** [July 10, 2026, 11:55am UTC](https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-144-2026-07-10/5431 "2026-07-10T11:55:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**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:** [July 10, 2026, 11:55am UTC](https://forum.scylladb.com/t/last-week-in-scylla-cluster-tests-git-master-issue-144-2026-07-10/5431/1 "2026-07-10T11:55:17Z")

</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 ad7b99ba…0b36672f range are covered.

There were 42 non-merge commits from 11 authors in that period. Some notable commits:

Loaders on AWS, GCE, and Azure were [switched to Ubuntu26 images](https://github.com/scylladb/scylla-cluster-tests/commit/1484439237ccee165e7678255ef7c1a253f51f23).

Rolling upgrade jobs were consolidated onto the [YAML-driven trigger matrix system](https://github.com/scylladb/scylla-cluster-tests/commit/a5c1a5a62614cb2ac16822a37c5aa39f89b5cb94) replacing the old XML-based weekly trigger and serving both cron runs and scylla-pkg release triggers.

Microbenchmark tests got [latency decorator error thresholds](https://github.com/scylladb/scylla-cluster-tests/commit/41e3d60039ac5ea775fb319434ab26175b414d14) defining fixed limits on allocs/cpu-cycles/instructions per op for amd64 and x86 read/write workloads.

A new [experimental logstor performance pipeline using Latte](https://github.com/scylladb/scylla-cluster-tests/commit/cb771d43b52c3c3205e8391c714702a1c0dd5f1c) was also added, running a mixed 30/70 write/read workload on a 4-node i4i.4xlarge cluster with simulated racks and rack-aware loaders.

The CS-to-Scylla migrator [switched its EMR provisioning to native Spark 4.x](https://github.com/scylladb/scylla-cluster-tests/commit/df7a43e59ba5d99ed21a2aeea5114e2a9fd29750) now that Spark 4.0 is GA on EMR, keeping the old bootstrap/script-runner path available behind a new config flag for cases that still need it.

[cassandra-stress was bumped to v3.21.0](https://github.com/scylladb/scylla-cluster-tests/commit/872cfd35dea52471082b241abdc848fd4ac849b8), enriching read-validation error messages with diagnostic detail.

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