Importance

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Abstract

A method and apparatus pass messages between server and client applications using a fault tolerant storage system (FTSS). The interconnection fabric that couples the FTSS to the computer systems that host the client and server applications may also be used to carry messages. A networked system capable of hosting a distributed application includes a plurality of computer systems coupled to an FTSS via an FTSS interconnection fabric. The FTSS not only processes file-related I/O transactions, but also includes several message agents to facilitate message transfer in a reliable and fault tolerant manner. The message agents include a conversational communication agent, an event-based communication agent, a queue-based communication agent, a request/reply communication agent, and an unsolicited communication agent. The highly reliable and fault tolerant nature of the FTSS ensures that the FTSS can guarantee delivery of a message transmitted from a sending computer system to a destination computer system. As soon as a message is received by the FTSS from a sending computer system, the message is committed to a nonvolatile fault tolerant write cache. Thereafter, the message is written to a redundant array of independent disks (RAID) of the FTSS, and processed by one of the message agents.

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First Claim