초록 ▼

A method and system for maintaining a unique reserve command relationship between an initiator and a target device in a Fibre Channel network across network address changes after a break in communication. The present invention maintains triplet tables containing data triplets, comprised of the netwo

A method and system for maintaining a unique reserve command relationship between an initiator and a target device in a Fibre Channel network across network address changes after a break in communication. The present invention maintains triplet tables containing data triplets, comprised of the network address, the port name, and the node name, for each initiator and each target device. Following a break in network communication that results in the network address of an initiator and/or a target device changing, the method of the present invention updates the recorded network addresses for the initiators and the target devices, maintains any previously-existing unique reserve command relationships and continues with I/O transmission. Although the network address of an initiator may change, the node name and port name of the initiator will remain the same. By comparing the initiator port name and node name contained in a reserve table maintained in the target device to the node name and port name corresponding to the now updated network address for an initiator with which it was in a unique reserve command relationship prior to the break in communication, a target device can then simply update the network address for the initiator and no disruption in I/O traffic will result.

대표청구항 ▼

[ What is claimed is:] [1.] A method for maintaining a unique reserve command relationship between an initiator and a target device in a Fibre Channel network across network address changes, comprising the steps of:maintaining in the initiator a target triplet table comprising a target triplet of da

[ What is claimed is:] [1.] A method for maintaining a unique reserve command relationship between an initiator and a target device in a Fibre Channel network across network address changes, comprising the steps of:maintaining in the initiator a target triplet table comprising a target triplet of data for the target device if the initiator is communicating with the target device;maintaining in the target device an initiator triplet table comprising an initiator triplet of data for the initiator if the initiator is communicating with the target device;maintaining in the target device a reserve table comprising a pair of data for the initiator if the initiator and the target device are in said unique reserve command relationship;if the initiator and the target device are in communication, sending from the initiator to the target device said initiator triplet of data following the resumption of communication after said break in communication for identifying the initiator to the target device;if the initiator and the target device are in communication, sending from the target device to the initiator said target triplet of data following the resumption of communication after said break in communication for identifying the target device to the initiator;comparing said pair of data from said reserve table with the initiator triplet of data sent by the initiator following the resumption of communication to identify, based on said initiator node name and an initiator node name and an initiator port name, that the initiator and the target device were in said unique reserve command relationship before said break in communication; andon the event that the target device and the initiator were in said unique reserve command relationship before said break in communication, continuing said unique reserve command relationship following the break in communication.