NFS as a user interface to a high-performance data system Page: 4 of 8
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3
HPDS Disk HPDS File HPDS Tape
Array Storage Server Subsystem Array Storage
Subsystem NFS FTP Subsystem
CBI CBI CBI
High-Performance Cross High-Performance Robotic
Disk Arraync CBI/pp Bar CBI/pp Tape System [sem
Frame CBI/pp CBI Gateway
BuHPer
CBI
Cross
CBI Bar CBI/pp
Switch
Synchronous
CBI O tical Network Long
(SONET) Distance
CBI Cross Bar Interface
CBI/pp Cross Bar Interface
with protocol processing
Figure 2. High-Performance Data System.the debugging process, and increase portability.
Performance will not be affected because data is
not being processed, and the workstation will
be a dedicated file server.
The file server will maintain a directory with
enough information to handle NFS information
and directory commands, including lookup,
getattr, setattr, rename, readlink, mkdir, rmdir,
link, and symlink. This directory will be
maintained by a relational database that will
provide easy access, allow new fields to be
added in the future without requiring a rebuild,
and provide a reporting capability. The
database will have an entry for every file thatcontains a directory handle, file handle, file
name, bitfile id, server id, and security flags.
Tables will be maintained to support the mount
and unmount commands.
The file server's interface to the storage
subsystems will consist of the file commands
create, delete, store, and retrieve. Upon
completion of a command, the storage
subsystem will notify the file server so an NFS
command can be generated and directory
information updated. Port information will be
provided by the client computer to the storage
subsystem in the read and write command.
The NFS commands modified by HPDS areNFS as a User Interface to a High-Performance Data System
October 1991
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Mercier, C.W. NFS as a user interface to a high-performance data system, article, January 1, 1991; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1059393/m1/4/: accessed April 26, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.