HP Advanced Server V7.3B for OpenVMS and HP PATHWORKS V6.1 for OpenVMS (Advanced Server)

HP Advanced Server V7.3B for OpenVMS
FEATURES
The Advanced Server for OpenVMS adds an additional dimension to general-purpose
OpenVMS systems. Along with providing traditional support for business, scientific, and
engineering applications, the server allows an OpenVMS operating system to appear to PC
clients as a Windows NT Server.
The major features of the Advanced Server for OpenVMS are described in the following
sections.
File Services
The Advanced Server for OpenVMS provides clients with a remote file system that appears as
a transparent extension of the client system’s local computing environment.
The Advanced Server lets users share OpenVMS files. The Advanced Server file shares are
based on Microsoft’s Advanced Server V3.0 SMB (Server Message Block) protocols. You
can use discretionary Windows NT access controls on each file and directory to specify the
groups and users that can access files, to define the levels of access that each group or user
is permitted, and to control auditing supported by Windows NT-like security. Additional, optional
security is provided by OpenVMS file and directory protections.
Each file stored in a file service is stored as an OpenVMS file in Record Management Services
(RMS) format. Four types of RMS file or record formats are allowed and supported on each
volume:
• Sequential stream
• Sequential stream_LF
• Sequential fixed-length record (512 bytes per record)
• Sequential undefined
The Advanced Server for OpenVMS provides improved performance for access of sequential
and VFC (variable length with fixed-length control) files. On ODS-2 volumes, the file has to
be read completely to determine the correct file size. The Advanced Server supports file-size
calculations for RMS sequential and VFC files on ODS-5 volumes. This reduces the number of
I/Os and the file-open time when the Advanced Server opens a file for the first time.
Multiple clients can concurrently access files stored on the server’s disk through the file-
access modes and byte-range locking support provided by the Advanced Server. In addition,
opportunistic locking allows clients to lock files and cache data locally without risk of another
user changing the file; this provides performance improvements and reduces network traffic
related to client/server communication.
Note: The Advanced Server does not support concurrent simultaneous access to files by
OpenVMS processes and the Advanced Server processes.
Files stored in a file service are accessible to PC clients, to OpenVMS users, and to applications
that can interpret the content and organization of a file written by the client application.
3