| 摘要 |
Provided are a method, system, computer storage device, and storage area network for maintaining a communication path from a host to a storage subsystem in a network. A storage subsystem controls data transfer and access to a storage devices in a network including a switch and a host. A topological storage stores topological coupling relationship between the host and the switch and a topological coupling relationship between the switch and the storage subsystem. In response to determining a failed path, the storage subsystem determines a first port on the storage subsystem in the failed path. The storage subsystem determines from the topology storage the topological coupling relationships between the host and the switch and the switch and the storage subsystem. The storage subsystem redirects, based on the topological coupling relationships, a message sent to the first port of the storage subsystem to an operational second port in the storage subsystem. |
| 主权项 |
1. A method, comprising:
controlling, by a storage subsystem, data transfer and access to storage devices in a network, wherein the storage subsystem is coupled to a switch and the switch is coupled to a host in the network; providing a topological storage coupled to the host, the switch and the storage subsystem, for storing a topological coupling relationship between the host and the switch and a topological coupling relationship between the switch and the storage subsystem; in response to determining a failed path between the storage subsystem and the switch coupled to the storage subsystem, determining, by the storage subsystem, a first port on the storage subsystem in the failed path; determining, by the storage subsystem, from the topology storage the topological coupling relationship between the host and the switch and the topological coupling relationship between the switch and the storage subsystem; and redirecting, by the storage subsystem, based on the topological coupling relationships, a message sent to the first port of the storage subsystem to an operational second port in the storage subsystem coupled to the switch by performing:
determining, based on a zone in which the first port is located in the topological coupling relationship, a host whose communication is affected and a second port of the host;obtaining, based on the topological coupling relationship, a third port in the storage subsystem, having no communication failure, coupled to the switch;instructing the topological storage to place the second port and the third port into one zone; andinstructing the host, whose communication is affected, to modify a storage subsystem receiving port for a transmit frame sent to the first port of the storage subsystem to the third port. |
