DEVICE AND METHOD FOR CONTROLLING NUMBER OF LOGICAL PATHS
First Claim
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1. A control device of a computer system in which a plurality of host computers are capable of sharing a same host interface of a storage system,wherein the storage system comprises:
- a plurality of host interfaces capable of being shared by the plurality of host computers,a plurality of virtual logical volumes (VVOL) respectively provided to the plurality of host computers, anda plurality of actual logical volumes (VOL) mapped to any of the plurality of VVOL,wherein a plurality of logical paths that pass through any of the plurality of host interfaces span between the plurality of host computers and the plurality of VVOL, and the host computers access, via paths spanning to themselves, the VVOL connected to these paths, thereby achieving access to the VOL mapped to the VVOL,and wherein the control device comprises,a VOL status monitoring portion that monitors a VOL status of each VOL mapped to the VVOL and determines whether or not the VOL status is changed, anda path number control portion that updates a number of paths connecting to a target VVOL, which is a VVOL in which the VOL status has changed.
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Abstract
In a control device of a computer system in which a plurality of host computers are capable of sharing a same host interface of a storage system are provided: a VOL status monitoring portion that monitors a VOL status of each VOL mapped to the VVOL and determines whether or not the VOL status is changed, and a path number control portion that updates the number of paths connecting to a VVOL in which the VOL status has changed.
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Citations
20 Claims
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1. A control device of a computer system in which a plurality of host computers are capable of sharing a same host interface of a storage system,
wherein the storage system comprises: -
a plurality of host interfaces capable of being shared by the plurality of host computers, a plurality of virtual logical volumes (VVOL) respectively provided to the plurality of host computers, and a plurality of actual logical volumes (VOL) mapped to any of the plurality of VVOL, wherein a plurality of logical paths that pass through any of the plurality of host interfaces span between the plurality of host computers and the plurality of VVOL, and the host computers access, via paths spanning to themselves, the VVOL connected to these paths, thereby achieving access to the VOL mapped to the VVOL, and wherein the control device comprises, a VOL status monitoring portion that monitors a VOL status of each VOL mapped to the VVOL and determines whether or not the VOL status is changed, and a path number control portion that updates a number of paths connecting to a target VVOL, which is a VVOL in which the VOL status has changed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of controlling the number of logical paths in a computer system in which a plurality of host computers are capable of sharing a same host interface of a storage system,
wherein the storage system comprises: -
a plurality of host interfaces capable of being shared by the plurality of host computers, a plurality of virtual logical volumes (VVOL) respectively provided to the plurality of host computers, and a plurality of actual logical volumes (VOL) mapped to any of the plurality of VVOL, and wherein a plurality of logical paths that pass through any of the plurality of host interfaces span between the plurality of host computers and the plurality of VVOL, a VOL status of each VOL mapped to the VVOL is monitored and a determination is made as to whether, or not the VOL status is changed, and the number of paths connecting to a target VVOL, which is a VVOL in which the VOL status has changed, is updated.
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Specification