Storage control apparatus, storage system, and storage control method to adjust RAID system strip size

摘要

In a storage control apparatus, an acquiring unit acquires first information indicating the frequency of random access to a first logical region and second information indicating the data size of random access, based on the content of access from the information processing apparatus. A controlling unit determines the size of storage areas to be allocated to a second logical region based on the second information indicating the data size of random access when the first information indicates that the frequency of random access is equal to or greater than a threshold value. The controlling unit creates the second logical region using a plurality of storage devices. The controlling unit controls access from the information processing apparatus such that the access is made to the second logical region instead of the first logical region.

主权项

1. A storage control apparatus for use in controlling access from an information processing apparatus to a logical region in which a first storage area of a first size is allocated from each of a plurality of storage devices, the storage control apparatus comprising:
a processor that performs a procedure including: counting a count of random access operations to a first logical region and a total access count which is a sum of a count of sequential access operations to the first logical region and the count of random access operations; acquiring an average size of a plurality of data records accessed in the first logical region per random access operation; determining a second size of each of a plurality of second storage areas to be allocated to a second logical region based on the average size, the second size being larger than the first size and being assignable within a single storage device, and creating the second logical region by allocating each of the plurality of second storage areas in one of the plurality of storage devices when a ratio of the count of random access operations to the total access count is equal to or greater than a threshold value; and controlling access from the information processing apparatus such that the access is made to the second logical region instead of the first logical region and is distributed among the plurality of storage devices from which the plurality of second storage areas are allocated.