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
are inadvertently deleted, lost, or corrupted. RMS
Journaling recovers the file by applying the journaled
modifications to a backup copy, thereby restoring its
final state. Application modifications are not neces-
sary to use after-image journaling.
• Before-image journaling. Allows users to reverse
modifications that have been made to a file. This type
of journaling allows users to return a file to a previ-
ously known state. This is useful if a file is updated
with incorrect or bad data. Application modifications
are not necessary to use before-image journaling.
• Recovery unit journaling. Allows users to maintain
transaction integrity. A transaction can be defined as
a series of file updates on one or more files. If any
failure occurs during the transaction, recovery unit
journaling rolls back the partially completed transac-
tion to its starting point. This allows complex transac-
tions to be completed as an atomic event—partially
completed transactions can be avoided. Recovery
unit journaling requires application modification.
The binary kit for RMS Journaling ships with the
OpenVMS Alpha and VAX distribution kits. To run the
software, customers must purchase a license and doc-
umentation. Refer to the RMS Journaling for OpenVMS
Software Product Description (SPD 27.58.xx) for more
information.
DECram for OpenVMS
DECram for OpenVMS, a separately orderable layered
product, is a disk device driver that improves I/O per-
formance by allowing an OpenVMS system manager
to create pseudo disks (RAMdisks) that reside in main
memory. Frequently accessed data can be accessed
much faster from a DECram device than from a physical
disk device. These RAMdisks can be accessed through
the file system just as physical disks are accessed, re-
quiring no change to application or system software.
Because main memory is allocated for the DECram de-
vice, extra memory is generally required. The Open-
VMS system manager can designate the amount of
memory dedicated to the DECram device(s) and the
files that will be stored on it. The maximum size of
a single DECram device is 524,280 blocks. Refer to
the DECram for OpenVMS Software Product Descrip-
tion (SPD 34.26.xx) for more information.
DECwindows Motif for OpenVMS
Compaq offers a separately orderable layered prod-
uct called DECwindows Motif for OpenVMS. This prod-
uct provides support for both OSF/Motif, a standards-
based graphical user interface, and the X user inter-
face (XUI) in a single run-time and development en-
vironment. DECwindows Motif displays the OSF/Motif
user interface. Because both Motif and XUI are based
on X Consortium’s X Window System, applications writ-
ten on either toolkit will run regardless of which envi-
ronment the user selects. Refer to the DECwindows
Motif for OpenVMS Software Product Description (SPD
42.19.xx) for more information.
DECwindows Motif Version 1.2-4 for OpenVMS Alpha
delivers the New Desktop environment for OpenVMS
Alpha systems, which is derived from the CDE (Com-
mon Desktop Environment) technology. CDE provides
and defines a consistent user interface for end users
and a consistent development environment for applica-
tion developers across multiple platforms.
The OpenVMS software installation procedure contains
an optional step to install the DECwindows Motif for
OpenVMS workstation and font support, which is re-
quired to run the DECwindows Motif for OpenVMS lay-
ered product. Refer to the OpenVMS Alpha Version
7.1 Upgrade and Installation Manual or OpenVMS VAX
Version 7.1 Upgrade and Installation Manual for details
concerning the optional installation of the DECwindows
Motif for OpenVMS device support.
Enhanced X Window System Display PostScript
The X Window System Display PostScript system pro-
vided with DECwindows Motif extends the native X
graphical programming environment for DECwindows
users. This system allows users to display text or im-
ages on workstations that support the XDPS extension.
The DECwindows Motif for OpenVMS layered product
must be installed and licensed to use Display PostScript.
The X Window System Display PostScript has two com-
ponents:
• Display PostScript server extension, which is pro-
vided with the display server in the OpenVMS Alpha
and OpenVMS VAX operating systems. A worksta-
tion is required to use this server.
• Adobe client libraries, which are used by applications
to perform PostScript operations, such as rotating
and scaling fonts, generating curves, and display-
ing PostScript documents. The Adobe client libraries
are available in the DECwindows Motif for OpenVMS
layered product, as well as on third-party platforms,
including IBM, Sun, and Silicon Graphics.
X Display PostScript adds the following capabilities to
the basic X11R6 Window System environment:
• DECwindows fonts can be displayed at any size and
rotation angle.
• Display PostScript graphics are specified in a user-
defined coordinate system independent of monitor
density.
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