Computer system and its renewal method

1. A management computer for managing a storage system comprising:

a high-level connecting device coupled to the management computer;

a computer, coupled to the management computer, for executing various processing sequences according to implemented application software;

a storage apparatus from or to which the computer reads or writes data; and

a low-level connecting device for connecting the computer, the storage apparatus, and the high-level connecting device,

wherein the computer, the storage apparatus, and the low-level connecting device may be introduced to, or removed from, the storage system,

wherein the management computer stores:

computer and storage apparatus internal configuration information indicating a configuration of the computer and storage apparatus;

configuration information about a computer and storage apparatus to be introduced, and indicates a configuration of a computer and storage apparatus that may possibly be introduced to the storage system; and

utilization rate information indicating the content of usage of the computer and storage apparatus; and

wherein the management computer is configured to:

obtain connectivity guarantee information indicating whether a connection between the computer and the storage apparatus is guaranteed or not;

select the computer and storage apparatus to be introduced to the storage system by referring to the computer and storage apparatus internal configuration information, the configuration information about the computer and storage apparatus to be introduced, the connectivity guarantee information, and the utilization rate information; and

output information about a computer and storage apparatus to be removed and the selected computer and storage apparatus to be introduced.

2. The management computer according to claim 1 , further comprising:

lifetime information indicating a lifetime of the computer and storage apparatus, and

being configured to refer to the lifetime information for selection of the computer and storage apparatus to be removed from the storage system, and output the information about the selected computer and storage apparatus to be removed.

3. The management computer according to claim 2 , further comprising:

extension plan information indicating the content of newly required equipment; and

being configured to select the computer and storage apparatus to be introduced by referring to the extension plan information.

4. The management computer according to claim 3 ,

wherein the utilization rate information retains information for chronologically indicating the content of usage of the computer and storage apparatus, and

the management computer is configured to calculate a performance improvement rate of the required equipment based on the utilization rate information, and refer to the performance improvement rate for the selection of the computer and storage apparatus to be introduced.

5. The management computer according to claim 4 ,

wherein the computer and storage apparatus internal configuration information and the configuration information about the computer and storage apparatus to be introduced include a model number of the required equipment, a number of connections for external connection, performance, and topology information.

6. The management computer according to claim 5 ,

wherein the computer operates a virtual computer,

wherein the storage apparatus provides the virtual computer with a storage area,

wherein the management computer is configured to retain connecting path information indicating a correspondence relationship between the virtual computer and the storage area, migrate the virtual computer, which is operating in the computer and storage apparatus, and the storage area, by referring to the connecting path information, and output a result of the migration.

7. The management computer according to claim 6 ,

wherein the connecting path information includes a latency policy indicating whether or not it is necessary to have the virtual computer and the storage area operate in the same computer and storage apparatus.

8. The management computer according to claim 7 ,

wherein the management computer migrates the virtual computer and the storage area by referring to the connectivity guarantee information.

9. The management computer according to claim 8 ,

wherein the utilization rate information retains the information for chronologically indicating the content of usage of the computer and storage apparatus, and

wherein the management computer calculates the performance improvement rate of the required equipment based on the utilization rate information, and refers to the performance improvement rate for the migration of the virtual computer and the storage area.

10. A management method in a management computer for managing a storage system having:

a high-level connecting device coupled to the management computer;

a computer, coupled to the management computer, for executing various processing sequences according to implemented application software;

a storage apparatus from or to which the computer reads or writes data; and

a low-level connecting device for connecting the computer, the storage apparatus, and the high-level connecting device,

wherein the computer, the storage apparatus, and the low-level connecting device may be introduced to, or removed from, the storage system,

the management method comprising the steps of:

storing computer and storage apparatus internal configuration information indicating a configuration of the computer and storage apparatus;

storing configuration information about a computer and storage apparatus to be introduced, and indicates a configuration of a computer and storage apparatus that may possibly be introduced to the storage system; and

storing utilization rate information indicating the content of usage of the computer and storage apparatus;

obtaining connectivity guarantee information indicating whether a connection between the computer and the storage apparatus is guaranteed or not;

selecting the computer and storage apparatus to be introduced to the storage system by referring to the computer and storage apparatus internal configuration information, the configuration information about the computer and storage apparatus to be introduced, the connectivity guarantee information, and the utilization rate information; and

outputting information about a computer and storage apparatus to be removed and the selected computer and storage apparatus to be introduced.

11. The management method according to claim 10 , further comprising the steps of:

storing lifetime information indicating a lifetime of the computer and storage apparatus,

referring to the lifetime information for selection of the computer and storage apparatus to be removed from the storage system, and

outputting the information about the selected computer and storage apparatus to be removed.

12. The management method according to claim 11 , further comprising the steps of:

storing extension plan information indicating the content of newly required equipment; and

selecting the computer and storage apparatus to be introduced by referring to the extension plan information.

13. The management method according to claim 12 ,

wherein the utilization rate information retains information for chronologically indicating the content of usage of the computer and storage apparatus, and

the management method further comprising the steps of:

calculating a performance improvement rate of the required equipment based on the utilization rate information, and

referring to the performance improvement rate for the selection of the computer and storage apparatus to be introduced.

14. The management method according to claim 13 ,

wherein the computer and storage apparatus internal configuration information and the configuration information about the computer and storage apparatus to be introduced include a model number of the required equipment, a number of connections for external connection, performance, and topology information.

15. The management method according to claim 14 ,

wherein the computer operates a virtual computer,

wherein the storage apparatus provides the virtual computer with a storage area, and

the management method further comprising the steps of:

retaining connecting path information indicating a correspondence relationship between the virtual computer and the storage area,

migrating the virtual computer, which is operating in the computer and storage apparatus, and the storage area, by referring to the connecting path information, and

outputting a result of the migration.

16. The management method according to claim 15 ,

wherein the connecting path information includes a latency policy indicating whether or not it is necessary to have the virtual computer and the storage area operate in the same computer and storage apparatus.

17. The management method according to claim 16 , further comprising the step of:

migrating the virtual computer and the storage area by referring to the connectivity guarantee information.

18. The management method according to claim 17 ,

wherein the utilization rate information retains the information for chronologically indicating the content of usage of the computer and storage apparatus, and

the management method further comprising the steps of:

calculating the performance improvement rate of the required equipment based on the utilization rate information, and

referring to the performance improvement rate for the migration of the virtual computer and the storage area.