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A system and method for simulating a software protocol stack over an emulated network using an emulated protocol. A storage operating system simulator, executing on a host computer, includes an interconnect communication stack that utilizes an emulated protocol over an emulated network to communicat

A system and method for simulating a software protocol stack over an emulated network using an emulated protocol. A storage operating system simulator, executing on a host computer, includes an interconnect communication stack that utilizes an emulated protocol over an emulated network to communicate with another storage operating system simulator configured in a cluster configuration.

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What is claimed is: 1. A system for simulating software protocol stacks, the system comprising: a host computer executing a host operating system and a plurality of storage operating system simulators, each storage operating system simulator including a software protocol stack; and an interprocess

What is claimed is: 1. A system for simulating software protocol stacks, the system comprising: a host computer executing a host operating system and a plurality of storage operating system simulators, each storage operating system simulator including a software protocol stack; and an interprocess data pathway interconnecting the software protocol stacks, whereby the software protocol stacks are utilized in performing input/output operations over the data pathway. 2. The system of claim 1 wherein the software protocol stack comprises an interconnect communication stack. 3. The system of claim 2 wherein the interconnect communication stack comprises: an interconnect bulk module adapted to provide flow control over the interprocess pathway; and an emulated protocol module adapted to emulate a protocol that supports remote direct memory access operations over a protocol that does not natively support remote direct memory access operations. 4. The system of claim 3 wherein the protocol that supports remote direct memory access operations comprises a virtual interface protocol. 5. The system of claim 3 wherein the protocol that does not natively support remote direct memory access operations comprises an Ethernet protocol. 6. The system of claim 1 wherein the interprocess data pathway comprises a shared memory space of ring buffers. 7. The system of claim 1 wherein the interprocess data pathway comprises a socket pair between the software protocol stacks. 8. A system for simulating software protocol stacks, the system comprising: means for executing a plurality of storage operating system simulators, each of the storage operating system simulators including a software protocol stack; and means for interconnecting the software protocol stacks, whereby the software protocol stacks are utilized in performing input/output operations over the means for interconnecting the software protocol stacks. 9. The system of claim 8 wherein the software protocol stack comprises an interconnect communication stack. 10. The system of claim 9 wherein the interconnect communication stack comprises: means for providing flow control over the data pathway; and means for emulating a protocol that supports remote direct memory access operations over a protocol that does not natively support remote direct memory access operations. 11. The system of claim 9 wherein the protocol that supports remote direct memory access operations comprises a virtual interface protocol. 12. The system of claim 9 wherein the protocol that does not natively support remote direct memory access operations comprises an Ethernet protocol. 13. The system of claim 8 wherein the means for interconnecting the software protocol study comprises a shared memory space of ring buffer. 14. The system of claim 8 wherein the means for interconnecting the software protocol stacks comprises a socket pair between the software protocol stacks. 15. A method comprising: executing, on a host computer having a host operating system, two or more storage operating system simulators, each having a software protocol stack; and interconnecting the software protocol stacks by an interprocess data pathway, whereby the software protocol stacks are utilized in performing input/output operations over the data pathway. 16. The method of claim 15 further comprising: generating a packet in a first protocol stack of the software protocol stacks; transferring the packet over the interprocess data pathway to a second protocol stack of the software protocol stacks; and processing the packet in the second protocol stack. 17. The method of claim 16 further comprising: executing a cluster failover module to generate the packet. 18. The method of claim 16 further comprising: executing a Small Computer Systems Interface (SCSI) target module to generate the packet. 19. The method of claim 16 further comprising: executing an emulated Virtual Interface protocol adaptor (MVIA) module to transfer the packet. 20. The method of claim 16 wherein the packet has a command, the method further comprising: determining whether the command is either a read command or a write command. 21. The method of claim 20 further comprising: directly accessing a memory of the second protocol stack with a command when the command is a read command. 22. The method of claim 20 further comprising: passing the command through an emulated Virtual Interface protocol adaptor (MVIA) when the command is a write command, the MVIA configured to implement a protocol layer that maps an API with appropriate semantics onto a transport medium that lacks the appropriate semantics; and accessing a memory interfaced to the MVIA with the command. 23. The method of claim 22 wherein the API is a Small Computer System Interface (SCSI) target module. 24. The method of claim 15 further comprising: performing testing of the storage operating system. 25. The method of claim 15 further comprising: performing debugging of the storage operating system.