Installation manual

Small Capacity System Disks
H.2 Tailoring Considerations
H.2.1 Configuration Goals
The basic configuration goal for the limited space support option is for an
environment that is not used for programming. Typically, this is a system with a
few user applications or a turnkey system. It is possible to build a viable system
with a single programming language environment (notably, the C language);
however, the space used for this support and for the compiler reduces the amount
of available user space.
There are some mechanisms and techniques common to any space-constrained
system both for installing new systems and for upgrading existing systems. One
of the most important considerations is to reduce the disk space consumption of
the normal, ongoing system environment before doing an upgrade or as soon as
possible during or after an installation. Some methods for accomplishing this are
discussed in Section H.5 and in Section H.6.
Note that, during an upgrade or installation, there is a period of time when
the windowing software is likely to be unavailable. This means that, on a
workstation, your monitor functions only as an operator console, and you cannot
use screen-oriented editors.
H.2.2 Controlling the Size of Dump, Page, and Swap Files
One of the primary things to control is the sizing of the dump, page, and swap
files in AUTOGEN. The tailoring facilities automatically use AUTOGEN to reboot
the system, adjusting anything that the tailoring might have affected. Because
AUTOGEN normally includes existing disk space in calculating the sizes for
these files, unexpected results can occur when tailoring removes some files and
AUTOGEN increases the size of others. Fixing the size of these files by adding
appropriate lines to the file SYS$SYSTEM:MODPARAMS.DAT will prevent this
from occurring during an upgrade or after an installation (and, possibly, while
installing layered products).
The following values are suggested as generous for an upgrade:
PAGEFILE = 38000
SWAPFILE = 13500
DUMPFILE = 0
If your system has been running successfully with smaller values, use those
instead.
If your windowing system is unavailable, you cannot use a screen-oriented editor
to add these lines to the SYS$SYSTEM:MODPARAMS.DAT file. You can use the
COPY command to add lines to the end of the text file as follows:
$ COPY SYS$SYSTEM:MODPARAMS.DAT,SYS$INPUT: SYS$SYSTEM:MODPARAMS.DAT
Return
newparam1 = value1
Return
newparam2 = value2
Return
Ctrl/Z
Note
To be able to use the delete key more effectively when typing input to
the console, set the operator terminal to be a scope (assuming it is not
a hardcopy device). To set the console terminal to be a scope, enter the
following command:
$ SET TERM/SCOPE/PERM _OPA0:
Small Capacity System Disks H–3