NoSQL news and engineering summaries

Netflix evolved its TimeSeries tiered storage from an Apache Kafka/Flink pipeline writing compacted Parquet to S3 into native Cassandra cold reads from existing S3 backups. Immutable Time Slices use ReadOnlyCompactionStrategy to align SSTables, while custom backup Memtables cache metadata locally and fetch data chunks on demand. An optional separate Cassandra cold cluster protects hot traffic. The system now stores over 15 PB, reduced disk usage from 80% to 7%, improved p90 latency by ~30%, and keeps p99 below 500 ms.

LatticeDB is an embedded single-file graph database for local, relationship-heavy workloads. It unifies graph traversal, HNSW vector similarity, and BM25 full-text search in one query layer, with ACID transactions, WAL-backed durability, event streams, and graph changefeeds. Python, TypeScript, Go, and CLI access it. Benchmarks report sub-microsecond lookups and 0.83 ms 10-NN search at 1M vectors, but single-writer, single-machine design limits scaling.