Storage management device, storage management method, and computer-readable recording medium

1. A storage management device comprising:

a memory; and

a controller that acquires load information on a storage area group that includes a plurality of storage areas, and stores the load information in the memory,

calculates an entire bandwidth of the storage area group based on the acquired load information on the storage area group,

holds coefficients indicating rates of proportional distribution in an equation for calculating each individual bandwidth allocated to each of the plurality of storage areas at each process of the calculating,

acquires coefficients corresponding to a notified process upon receiving a notification of an executed process using the each of the plurality of storage areas,

calculates each individual bandwidth using acquired coefficients by performing a proportional distribution method and an equal distribution method, and

allocates each of the individual bandwidths to each of the storage areas.

2. The storage management device according to claim 1 , wherein the controller calculates each of the individual bandwidths by equally dividing the entire bandwidth by a number of the storage areas included in the storage area group.

3. The storage management device according to claim 1 , wherein the controller calculates each of the individual bandwidths by setting the average between load information acquired by an immediately previous measurement on each of the storage areas and load information on each of the storage areas obtained at the same time on a day or more before the immediately previous measurement as the load information on each of the storage areas.

4. The storage management device according to claim 1 , wherein the controller calculates, from each of pieces of the load information on each of the storage areas, each use bandwidth that is used by each of the storage areas such that, when a sum of the calculated use bandwidths is equal to or less than the entire bandwidth, each of the use bandwidths corresponds to each of the individual bandwidths and, when the sum of the calculated use bandwidths is greater than the entire bandwidth, the sum of the individual bandwidths allocated to each of the storage areas corresponds to the entire bandwidth divided in proportion to the load information.

5. The storage management device according to claim 1 , wherein, in response to specification of a performance level with respect to each of the storage areas, the controller calculates, on the basis of the performance level, each of the individual bandwidths such that the sum of the individual bandwidths allocated to each of the storage areas corresponds to the entire bandwidth divided in proportion to the performance ratio.

6. The storage management device according to claim 1 , wherein the controller stores in the controller a plurality of parameters that is used to calculate the individual bandwidths, acquires information about a process that is performed by using the storage area group, changes the parameters on the basis of the process, and calculates each of the individual bandwidths such that the sum of the individual bandwidths allocated to each of the storage areas corresponds to the entire bandwidth.

7. The storage management device according to claim 1 , wherein the controller acquires load information on each of the storage areas, divides the entire bandwidth in proportion to the load information on each of the storage areas, and calculates each of the individual bandwidths.

8. A storage management method comprising:

acquiring load information on a storage area group that includes a plurality of storage areas;

calculating, using a processor, an entire bandwidth of the storage area group based on the acquired load information on the storage area group;

holding, using the processor, coefficients indicating rates of proportional distribution in an equation for calculating each individual bandwidth allocated to each of the plurality of storage areas at each process of the calculating;

acquiring, using the processor, coefficients corresponding to a notified process upon receiving a notification of an executed process using the each of the plurality of storage areas;

storing the coefficients in a performance information file;

calculating, using the processor, each individual bandwidth using the coefficients in the performance information file by performing a proportional distribution method and an equal distribution method, and

allocating, using the processor, each of the individual bandwidths to each of the storage areas.

9. A non-transitory computer-readable recording medium having stored therein a storage management program that causes a computer to execute a process comprising:

acquiring load information on a storage area group that includes a plurality of storage areas;

calculating an entire bandwidth of the storage area group based on the acquired load information on the storage area group;

holding coefficients indicating rates of proportional distribution in an equation for calculating each individual bandwidth allocated to each of the plurality of storage areas at each process of the calculating;

acquiring coefficients corresponding to a notified process upon receiving a notification of an executed process using the each of the plurality of storage areas;

calculating each individual bandwidth using acquired coefficients by performing a proportional distribution method and an equal distribution method, and

allocating each of the individual bandwidths to each of the storage areas.