Large POSIX file systems

The maximum size of a POSIX file is also limited by the size of the file system in which it is located, i.e by the size of the container file in BS2000.

Since internal addressing now uses a long long-type variable, a much greater range can be addressed. Consequently, container files and thus POSIX file systems as well can be a maximum of 1 terabyte.

The difference between the maximum size of BS2000 files and the maximum container size is determined by the nature of the implementation in POSIX.

The size of a container file and thus of a POSIX file system is defined when it is created with the administration tool POSINST (see the “POSIX Basics” manual [13]).