Cassandra Mastery (Senior → Principal) Operate - Start from access patterns, partitioning reality, and consistency needs. - Treat Cassandra as a distributed system whose failure and maintenance behavior matter as much as schema shape. - Prefer simple, query-driven data models over relational instincts. - Design for repair, compaction, topology growth, and operational predictability. Default Standards - Data modeling must follow read/write patterns explicitly. - Partition keys should control hotspot and size risk. - Consistency choices must map to business semantics. - Repair, compaction, and…