Abstract: A client computer is capable of designating one of a plurality access paths via respective servers on a file-by-file basis. The client computer defines a plurality of access paths to the storage device by way of the respective server computers (step S1). Next, when an access request defining a file within the storage device is received, the client computer determines a relay server computer which should provide an access path to the file, out of the server computers, according to a predetermined rule for distributing accesses to the storage device among the plurality of access paths on a file-by-file basis (step S2). Then, the client computer accesses the file within the storage device by the access path via the designated relay server computer.

Abstract: A cache control program that maintains a high cache hit ratio even in the case of a file of large size being accessed. A computer that executes the cache control program judges whether transferred data specified by a data read request and data following the transferred data are stored in a cache area including a plurality of blocks (step S1). The plurality of blocks are ranked according to order of reuse. The computer preferentially selects a block of high rank in order of reuse as a block for storing nonstored data that is not stored in the cache area (step S2). The computer transfers in order the nonstored data in a storage device to the storage block (step S3) and reads the transferred data into a predetermined storage area (step S4). The computer judges whether there is continuity between the transferred data and data transferred just before the transferred data.

Abstract: A client computer is capable of designating one of a plurality access paths via respective servers on a file-by-file basis. The client computer defines a plurality of access paths to the storage device by way of the respective server computers (step S1). Next, when an access request defining a file within the storage device is received, the client computer determines a relay server computer which should provide an access path to the file, out of the server computers, according to a predetermined rule for distributing accesses to the storage device among the plurality of access paths on a file-by-file basis (step S2). Then, the client computer accesses the file within the storage device by the access path via the designated relay server computer.

Abstract: A cache control program that maintains a high cache hit ratio even in the case of a file of large size being accessed. A computer that executes the cache control program judges whether transferred data specified by a data read request and data following the transferred data are stored in a cache area including a plurality of blocks (step S1). The plurality of blocks are ranked according to order of reuse. The computer preferentially selects a block of high rank in order of reuse as a block for storing nonstored data that is not stored in the cache area (step S2). The computer transfers in order the nonstored data in a storage device to the storage block (step S3) and reads the transferred data into a predetermined storage area (step S4). The computer judges whether there is continuity between the transferred data and data transferred just before the transferred data.