yrmcds – memory object caching system with master/slave replication

yrmcds is a memory object caching system with master/slave replication.

The software supports two protocols: the first is an enhanced memcached, and another is a protocol to implement distributed resource counters.

Since the memcached protocol is perfectly compatible with the original implementation, yrmcds can be used as a drop-in replacement for memcached. Thanks to its virtual-IP based replication system, existing applications can obtain high-available memcached-compatible service without any modifications.

This is free and open source software.

Features include:

  • Complete memcached text and binary protocols with these extensions:
    • Server-side locking. A lock associates an existing object and a client connection. Locked objects will neither be expired nor be evicted.
    • Dump keys.
  • Distributed resource counter protocol.
  • Optional memory security to store confidential information like SSL session data.
  • Large objects can be stored in temporary files, not in memory.
  • Virtual-IP based master-slave replication.
  • Automatic fail-over.
  • Automatic recovery of redundancy.
  • Global LRU eviction / no slab distribution problem.
  • Unlike memcached, yrmcds is not involved with slabs problems.

Support: GitHub Code Repository
Developer: Cybozu
License: BSD 2-Clause “Simplified” License

yrmcds is written in C++. Learn C++ with our recommended free books and free tutorials.

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