BS2000 permits UNIX file systems to be accessed via NFS.
Files from BS2000 and from open systems can consequently be stored and edited in the server network in the storage space released by file servers.
The following terms are used in BS2000 when working with Net-Storage:
Net server
A file server in the worldwide computer network which provides storage space (Network Attached Storage, NAS) for use by other servers and offers corresponding file server services.
Net-Storage
Storage space provided by a net server in the computer network and storage space released for use by foreign servers. Net-Storage can be a file system or also just a node in the net server’s file system.
Net client
Implements access to Net-Storage for the operating system using it.
In BS2000 the net client, together with the BS2000 subsystem ONETSTOR, transforms the BS2000 file accesses to corresponding UNIX file accesses and executes them on the net server using NFS.
The net client for SUs /390 and S servers is the HNC, and for SUs x86 the X2000 carrier system.
Net-Storage volume
Net-Storage volumes represent Net-Storage in BS2000 which provides systems support as an enhancement of data pubsets.
As of BS2000 V21.0A besides the conventional Net-Storage volume of type NETSTOR a second Net-Storage volume of type NETVOL is introduced.
For files on a Net-Storage volume of type NETVOL there only exist the catalog entries within the TSOSCAT of the pubset whereas every Net-Storage volume of type NETSTOR has its own file catalog named .BS2FSCAT.
It carries for all files, which are stored on a Net-Storage volume of type NETSTOR, a copy of the catalog entry within the TSOSCAT of that pubset the Net-Storage volume is assigned to.
As of BS2000 V21.0A the command ADD-NET-STORAGE-VOLUME always establishes a Net-Storage volume of type NETVOL and assignes it to a pubset. Existing Net-Storage volumes of type NETSTOR are still supported by BS2000 V21.0A.
Both Net-Storage volumes of type NETVOL and Net-Storage volumes of type NETSTOR are addressed by means of their Volume Serial Number (VSN) and the type NETSTOR. In the released file system of the net server the VSN of the Net-Storage volume corresponds to the directory containing the user files and metadata.
Net-Storage file
Is a file which is created on a Net-Storage volume. On Net-Storage a distinction is made between the two file types BS2000 file and node file.
BS2000 file
Is a file which is only created and processed by BS2000. BS2000 files on Net-Storage (FILE-TYPE=BS2000) have been supported since BS2000/OSD-BC V9.0. They are located directly on a Net-Storage volume. Open systems may only access them in read mode.
Node file
Is a Net-Storage file (FILE-TYPE=NODE-FILE) which can be created and processed by both BS2000 and open systems. Node files have been supported since BS2000 OSD/BC V10.0. They are located on a Net-Storage volume in a user-specific directory (name of the user ID), and the file names comply with the BS2000 naming conventions.
Node files can be stored on Net-Storage volumes both of type NETVOL and of type NETSTOR.
Interoperability on Net-Storage
Both BS2000 and open systems can be connected to the same Net-Storage, create node files there, and can each process these:
BS2000 can create and process node files on Net-Storage - open systems can also process these files
Open systems can create and process node files on Net-Storage - BS2000 can import and also process these node files.