Method and an apparatus for managing access path
First Claim
1. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
- selecting a second access path that can be used as a replacement of a first access path that is currently in use to connect the data storage device and the host computer, wherein the second access path is selected in advance of a defect on the first access path;
calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path;
calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration;
determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; and
outputting a determination result,wherein a value of the quantity of traffic on the first access path is reduced, and the reduced value is added to the quantity of traffic associated with the device on the second access path, to calculate the variation of the quantity of traffic in the respective devices on the second access path.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention grasps in advance a portion in which traffic is concentrated and which may become a bottleneck and simplifies management of an access path. In a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, access paths are managed by a management server. The management server selects a second access path that can be used as a replacement of a first access path that connects the data storage device with the host computer, and calculates the quantity of traffic on the first access path which is associated with a device disposed on the first access path. Also, the management server calculates a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic into consideration. Then, the management server determines whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path. The management server 11 transfers the determined result to the outside, for example, a display device, and notifies a manager of the determined result.
19 Citations
14 Claims
-
1. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that is currently in use to connect the data storage device and the host computer, wherein the second access path is selected in advance of a defect on the first access path; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; and outputting a determination result, wherein a value of the quantity of traffic on the first access path is reduced, and the reduced value is added to the quantity of traffic associated with the device on the second access path, to calculate the variation of the quantity of traffic in the respective devices on the second access path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that is currently in use to connect the data storage device and the host computer, wherein the second access path is selected in advance of a defect on the first access path; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; and outputting a determination result, wherein in the determination of the bottleneck, in the case where a ratio of the calculated value of the variation of traffic and the calculated value of the traffic before switching is larger than a given value, it is determined that there is a bottleneck.
-
-
10. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that is currently in use to connect the data storage device and the host computer, wherein the second access path is selected in advance of a defect on the first access path; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; and outputting a determination result, wherein the determination of the bottleneck is conducted by comparing the calculated value of the traffic after switching which is a value obtained by adding the calculated value of the variation of the traffic to the calculated value of the traffic before switching with a value indicative of an allowable value of the traffic of the device on the second access path.
-
-
11. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that connects the data storage device and the host computer; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; outputting a determination result, wherein a value of the quantity of traffic on the first access path is reduced, and the reduced value is added to the quantity of traffic associated with the device on the second access path, to calculate the variation of the quantity of traffic in the respective devices on the second access path. - View Dependent Claims (12)
-
-
13. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that connects the data storage device and the host computer; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; outputting a determination result, wherein in the determination of the bottleneck, in the case where a ratio of the calculated value of the variation of traffic and the calculated value of the traffic before switching is larger than a given value, it is determined that there is a bottleneck.
-
-
14. A method for managing an access path in a storage network system that forms multiple paths between a large-capacity data storage device and a host computer that employs the data storage device, and transfers data by means of a selected path, the method comprising:
-
selecting a second access path that can be used as a replacement of a first access path that connects the data storage device and the host computer; calculating a quantity of traffic on the first access path which is associated with a device disposed on the first access path; calculating a variation of the quantity of traffic on the second access path which is associated with a device disposed on the second access path taking the calculated quantity of traffic on the first access path into consideration; determining whether the device on the second access path causes a bottleneck or not, according to the calculated value of the variation of traffic on the second access path; outputting a determination result, wherein the determination of the bottleneck is conducted by comparing the calculated value of the traffic after switching which is a value obtained by adding the calculated value of the variation of the traffic to the calculated value of the traffic before switching with a value indicative of an allowable value of the traffic of the device on the second access path.
-
Specification