Write-Heavy and Always On: Cassandra and Scylla on Kubernetes

Postgres is the platform&rsquo;s default database, and most of the time it is the right answer. Some workloads it is the wrong answer for: ingesting a firehose of writes that never stops, scaling linearly to many nodes, staying available for writes even when a node or a whole data center goes down. That is what Cassandra was built for, and it still earns its place in 2026 for those jobs. This post…