direct access file

The ordering process uses a direct access file but the input and output files of integrals are sequential.

Random access is more usual, and these files are often called (mistakenly) direct access files.

A true direct access file is one where there is a direct relationship between the key field of a record and a unique address on disk.

The reason is that the addition of records to direct access files is mathematically similar to the random addition of records to overflow areas.

At Volksbund Deutsche Kriegsgräberfürsorge there exists a direct access file of all known German war graves of World War I and II.

Direct Access File System (DAFS) is a network file system that is based on NFSv4 and the Virtual Interface (VI) data transfer mechanism.