Mobile Cache Protocol: a dynamic object relocation protocol for wide area networks

This paper proposes a relocation protocol of a replicated object in a widely distributed object system called Mobile Cache Protocol (MCP). MCP has four basic features: it creates a replicated object and allocates it on an intermediate site to reduce the latency of object retrieval in a wide area network; it supports both client and server oriented updates to achieve object consistency; it supports reservation of replication of an object; and several clients can share a replicated object to enhance storage efficiency. The protocol is summarized and implementation and various experiments of the protocol are described. Though it is designed for a distributed object based system, MCP also can be applied to dynamic Web caching.