Method and apparatus for connecting i/o channels between sub-cha

Details Method and apparatus for connecting i/o channels between sub-cha Method and apparatus for connecting i/o channels between sub-cha

1997-04-04

1999-11-30

Matar, Ahmad F.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output addressing

710 2, 710 1, 710 5, 710 8, 707 1, 709104, G06F 704, G06F 900

Patent

active

059960264

ABSTRACT:
A connection method of a plurality of input/output channels between a plurality of sub-channels of an information processing system having a virtual machine running on a physical machine under control of a hypervisor and a plurality of devices. The method includes issuing from the hypervisor a command for setting configuration information defining a plurality of configuration structures between the sub-channels set for the respective virtual machines and the devices in a storage device and acquiring configuration information containing the sub-channel corresponding to a designated device from the configuration information corresponding to one of the virtual machines based on the device designation contained in the input/output command from the one virtual machine. The virtual machines are enabled after the issuance of the set command and before the issuance of the input/output command. The corresponding configuration information is searched by using ID information of the virtual machine which issued the input/output command in order to execute the step so that one of a plurality of channel paths between a plurality of devices and the sub-channels is selected to execute the input/output designated by the input/output command.

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