Patent ID: 7788389
Filing Date: 2010-08-31
Classification: G06F

Abstract:
1. A program storage device readable by machine, embodying a program of instructions executable by the machine to perform a method for managing resources in a storage system being accessed by servers, said method comprising: allocating a command window to each of said servers accessing said resources, wherein said command window defines a limit on the number of outstanding storage requests that each server may maintain against said resources; initially operating in an equilibrium achievement mode that balances the size of each server's command window and the amount of free resources available in said resources, wherein, while operating in said equilibrium achievement mode, said method comprises increasing the size of each server's command window at a first rate as each of said servers completes a successful storage operation; changing to an equilibrium maintenance mode that balances the size of each server's command window and the amount of free resources available in said resources when a storage request is unsuccessful, wherein, while operating in said equilibrium maintenance mode, said method comprises: reverting to said equilibrium achievement mode when the level of free resources rises above an upper limit; and repeating said changing and reverting processes; wherein said repeating process acquires and maintains an equilibrium balance between the size of each command window and the amount of free resources.