Patent ID: 6199105
Filing Date: 2001-03-06
Classification: G06F

Abstract:
A recovery system for system coupling apparatuses consisting of a plurality of hosts and a plurality of coupling apparatuses for holding lock information on inter-host shared resources for common use by the plurality of hosts, wherein:each of said plurality of hosts requests one of the system coupling apparatuses to lock one of the inter-host shared resources, and stores lock information notified by the system coupling apparatus having locked the inter-host shared resource in compliance with the request;each of said plurality of system coupling apparatuses locks an inter-host shared resource whose locking has been requested by one of the hosts, holds lock information indicating that the inter-host shared resource has been locked, and notifies the requesting host of the lock information;one of said plurality of hosts, when one of said plurality of system coupling apparatuses fails, causes lock information held by other normal system coupling apparatuses to be deleted; andeach of said plurality of hosts requests one of said other normal system coupling apparatuses to lock an inter-host shared resource on the basis of lock information stored in the requesting host.