OSRM Shared Memory on Kubernetes: Zero-Downtime Updates
OSRM Shared Memory on Kubernetes: Live Traffic Updates with Zero-Downtime Answer-First: Operating OSRM on Kubernetes with live traffic updates uses POSIX shared memory (/dev/shm), atomic memory pointer swapping via osrm-datastore, and Multi-Level Dijkstra (MLD) cell customization without restarting routing pods. Sharing a single 15GB graph across 10+ worker pods cuts node RAM usage by 85%+ while delivering sub-2ms P99 matrix latencies and zero-downtime speed updates. Prerequisite: Readers should possess working knowledge of Linux shared memory architecture (POSIX shm_open, mmap, tmpfs volumes), Kubernetes IPC namespace configuration (emptyDir memory medium, shareProcessNamespace), and OSRM routing algorithms (Contraction Hierarchies, Multi-Level Dijkstra). ...