Mcrouter is a memcached protocol router for scaling memcached deployments. It sits between clients and memcached servers, handling routing decisions and connection management to enable large-scale cache infrastructure.
The tool solves the problem of efficiently distributing cache requests across multiple memcached instances. Rather than requiring clients to implement complex routing logic, mcrouter acts as a proxy that accepts memcached protocol requests and forwards them to appropriate backend servers based on configurable routing rules. This approach centralizes routing intelligence, simplifies client implementations, and allows dynamic reconfiguration without restarting clients.
Mcrouter suits organizations running large memcached deployments that need sophisticated request distribution, failover capabilities, and operational flexibility. It is particularly valuable when you require features like prefix-based routing, replicated pools for redundancy, traffic shadowing for testing, or multi-cluster support. The tool handles the memcached ASCII protocol and supports connection pooling, multiple hashing schemes, health monitoring with automatic failover, and online reconfiguration. Teams should adopt it when memcached's built-in client-side hashing becomes a bottleneck or when operational requirements demand centralized control over cache routing behavior.
Development activity shows consistent maintenance with regular build testing through automated workflows. The project maintains comprehensive documentation through its wiki and actively supports user discussions through a dedicated community group. Installation is straightforward through both package management on supported platforms and from source via standard autotools, with clear dependency specifications for required Facebook libraries.
