Abstract: A virtualization system comprises a plurality of host machines on which a virtual machine operates, a plurality of storages connected to the host machines through a fiber-channel switch; and a switch controller, the switch controller including a migration management unit which instructs the host machine on migration of the virtual machine, wherein the migration management unit instructs the fiber-channel switch connected to a migration destination to set host bus information so as to allow an access to the storage used at a migration source by the virtual machine which has migrated.

Abstract: In a computer system according to the present invention, a host sends a packet in which protocol information above a TCP layer and within a transport layer is included in an option area of a TCP header. An open flow controller set a flow entry wick defines a forwarding destination corresponding to the protocol information, in a switch. An open flow switch forwards the received packet toward a forwarding destination which corresponds to the protocol information included in the TCP header of the received packed. As a result, an adaptation of the computer system is increased.

Abstract: Disclosed is an information processing apparatus which makes it possible to reduce an amount of communication delay. The information processing apparatus includes an issuing unit configured to select a specific controller associated with a logical block, which is to be a target of an input/output process, on the basis of a set of policy information employed by a storage from among a plurality of sets of policy information associating the logical blocks with the controllers, and to send a request about the input/output process to the specific controller.

Abstract: In a computer system according to the present invention, a host sends a packet in which protocol information above a TCP layer and within a transport layer is included in an option area of a TCP header. An open flow controller set a flow entry wick defines a forwarding destination corresponding to the protocol information, in a switch. An open flow switch forwards the received packet toward a forwarding destination which corresponds to the protocol information included in the TCP header of the received packed. As a result, an adaptation of the computer system is increased.

Abstract: A virtualization system comprises a plurality of host machines on which a virtual machine operates, a plurality of storages connected to the host machines through a fiber-channel switch; and a switch controller, the switch controller including a migration management unit which instructs the host machine on migration of the virtual machine, wherein the migration management unit instructs the fiber-channel switch connected to a migration destination to set host bus information so as to allow an access to the storage used at a migration source by the virtual machine which has migrated.