bs2fs container
A file system of the type ufs which is used solely to accommodate files of bs2fs file systems temporarily. These files are then stored in directories (one directory for each mounted bs2fs file system) in the bs2fs container.
bs2fs file system
Selectable set of files in BS2000 which are made available in POSIX as a file system, thus enabling them to be accessed using POSIX means (commands, program interfaces). The files are selected using the user and catalog IDs and wildcard symbols.
copy daemon
System process which copies from BS2000 to the bs2fs container and back again.
daemon
Daemons are system processes which run permanently and normally in background mode, and which perform general tasks.
directory
A directory is used to group and organize files and subordinate directories of a hierarchical file systems.
file system
A file system is a hierarchical group of directories and files which are located physically on the same storage medium, e.g. in a partition or in a container file.
The term is used for organizational structures of files, such as UNIX file system, POSIX file system, hierarchical file system, other BS2000 file systems (DMS and LMS), for example.
file system type
Type of a file system in the file tree of POSIX or of a UNIX computer. The most familiar types are as follows:
Type bs2fs: BS2000 files which are made available under POSIX.
Type ufs: local file systems containing user data.
Type nfs: file systems which are located physically on remote computers.
Examples of further types: fdfs, proc, bfs, rfs and s5.
All types of file systems used in a system must be known when the system is configured; no new file system type can be added later. Information about the file system types which can be used in a system is provided by the sysfs() interface.
file tree
Overall hierarchy of the files on a UNIX computer or in POSIX. The UNIX or POSIX file hierarchy is organized on the basis of a tree structure. The root of the file tree is the root directory (/). All other directories are branches which emanate from the root. The files are the leaves of the tree. Each file is accessible via precisely one path of the file tree.
mounting
Local resources are made accessible in a local file system using the mount command; this is also referred to as mounting.
POSIX file system
File system on a BS2000 computer running POSIX. The POSIX file system corresponds to a UNIX file system.
root directory
The file system at which the file tree begins. The root directory is represented by the slash (/).
transparent file access
The user can access bs2fs files like ufs files (with the few restrictions described) using the same access functions or commands.
ufs (UNIX file system)
The ufs file system is the local standard file system in POSIX. It is implemented by a BS2000 file (of the type PLAM) in which the files of the file system are stored as on a UNIX disk.