DACH manufacturers face a three-layer compliance challenge — GDPR, Germany's IT Security Act 2.0, and OT network isolation requirements (IEC 62443, BSI IT-Grundschutz) — that makes cloud-first analytics databases architecturally incompatible with production environments. Cloud tools fail not because of storage region, but because OT network policies block outbound traffic to cloud endpoints entirely. CrateDB's shared-nothing, on-premises deployment addresses this by running distributed clustering without external coordination, exposing standard PostgreSQL wire protocol for local tools, and enabling selective table replication to a central on-premises cluster over private WAN. The Rauch Group case study demonstrates 400 records/second ingestion with sub-second query latency and full data residency. Edge deployments support OPC-UA and MQTT ingestion via Telegraf, with a single binary running from edge nodes up to facility-level clusters.
