Specifications

OpenVMS Operating System for Alpha and VAX (Versions 7.1, 7.1–1H1, 7.1–1H2, and 7.1–2) SPD 41.87.06
of space required for upgrading to a new version of the
OpenVMS Alpha operating system.
OpenVMS VAX DISK SPACE REQUIREMENTS
Disk Space Requirements (Block Cluster Size = 3)
To support the complete OpenVMS VAX operating sys-
tem environment, Compaq recommends a system disk
of greater than 150 MB. When you use a smaller disk,
additional tailoring is required before installing some of
the OpenVMS VAX options. This does not include the
dump file space. Refer to the OpenVMS VAX Version
7.1 Upgrade and Installation Manual for information on
tailoring.
Operating System Disk Space Requirements
The disk space requirements for OpenVMS VAX vary
according to which options are installed:
File Category
Space
Used Running Total
OpenVMS files 98.0 MB 98.0 MB
Paging file (after installa-
tion)
6.0 MB 104.0 MB
Swap file (suggested) 1.2 MB 105.2 MB
Dump file (optional) 6.2 MB 111.4 MB
Decompressed Help files
(optional)
7.0 MB 118.4 MB
Safeguard for upgrading 25.0 MB 143.4 MB
Variable additional
space (additional files,
INDEXF.SYS, etc.)
3.3 MB 146.7 MB
The data in the table was created from an installation on
a VAXServer 2000 with 6 MB of memory and an RD54
disk.
Additional memory adds to the space required for page,
swap, and dump files, and the variable additional space
increases with larger memory and disk.
DECwindows Motif for OpenVMS VAX Disk Space
Requirements
To support OpenVMS VAX and the DECwindows Mo-
tif for OpenVMS VAX layered product, Compaq recom-
mends a system disk of greater than 280 MB. The disk
space required for the installation of DECwindows Mo-
tif is 36 MB. The permanent amount of space used is
36 MB. An additional 16 MB are needed to install the
DECwindows X11 Display Server and associated files.
(The DECwindows X11 Display Server and associated
files are included in the OpenVMS VAX Version 7.1 me-
dia.) These disk space requirements are in addition to
the 78 MB required for the other components of the
OpenVMS VAX operating system environment. Refer
to the OpenVMS VAX Version 7.1 Upgrade and Instal-
lation Manual for details on tailoring small system disks
to support the DECwindows Motif environment.
Installation of the DECwindows Motif Version 1.2-4 lay-
ered product gives customers the option of installing any
or all of the following components:
• DECwindows Motif run-time support file base kit
— 24 MB. This section provides support for running
DECwindows Motif for OpenVMS VAX applications
on VAX compute servers and is a required part of
the installation. It includes the DECwindows desktop
applications and libraries.
• Programming support — 6 MB. This section
includes support for the DEC C, DEC C++,
DEC Fortran, Pascal, and VAX C programming lan-
guages. If a subset of languages is installed, the
amount of disk space required is less.
• Example file — approximately 6 MB.
Note that the individual sizes add up to more than the
total because some components are shared by multiple
portions of the environment.
MEMORY SPACE REQUIREMENTS
OpenVMS Alpha Memory Space Requirements
The minimum amount of memory supported for an
OpenVMS Alpha environment is dependent on the soft-
ware configuration and application requirements. The
following table gives examples of the minimum amount
of memory required for a system user to install, boot,
and log in to an OpenVMS Alpha Version 7.1–2 To en-
sure satisfactory performance for particular applications
or number of users, additional memory may be required.
Refer to specific layered product documentation for their
memory requirements.
Component
Necessary
Memory
OpenVMS Alpha Version 7.1–2 26.0 MB
Digital TCP/IP Services 1.0 MB
DECnet-Plus 3.0 MB
DECnet for OpenVMS Alpha 1.0 MB
VAXcluster 1.5 MB
DECwindows Motif with remote execution
of applications (X11 Display Server only)
3.5 MB
DECwindows Motif with local execution of
applications (includes X11 Display Server
and DECwindows Motif layered product)
12.0 MB
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