Patent ID: 8838850
Filing Date: 2014-09-16
Classification: G06F,H04L

Abstract:
1. A method for managing a group of storage control systems in communication with clients and storage arrays, each storage control system having tiering media and a coherence controller, comprising: discovering a master storage control system of the group of storage control systems; discovering connection information between clients and disks of the storage arrays established through the storage control systems; sending the connection information to the master storage control system; updating a connection table in the master storage control system that identifies the connection information discovered by each of the group of storage control systems; sending the connection information of the connection table to the group of storage control systems; using the connection information to maintain coherency between tiering media contained in the group of storage control systems; and generating a mapping table that maps different portions of a same virtual address range with tiering media located in different storage control systems of the group of storage control systems, wherein the mapping table maps different portions of a same logical address range with different tiering media operated by the different storage control systems; the mapping table includes address offsets for the different portions of the logical address range; and, the logic circuitry is configured to generate virtual addresses by adding the address offsets to physical addresses contained in the storage operations.