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HP OpenVMS Alpha Version 8.3 and HP OpenVMS Version 8.3-1H1 for Integrity Servers SPD 82.35.14
Record Management Services (RMS)
RMS is a set of I/O services that helps application pro-
grams to process and manage files and records. Al-
though it is intended to provide a comprehensive soft-
ware interface to mass storage devices, RMS also sup-
ports device-independent access to unit-record devices.
RMS supports sequential, relative, and indexed file or-
ganizations in fixed-length or variable-length record for-
mats. RMS also supports byte stream formats for se-
quential file organization.
RMS record access modes provide access to records
in four ways:
• Sequentially
• Directly by key value
• Directly by relative record number
• Directly by record file address
RMS also supports block I/O operations for vari-
ous performance-critical applications that require user-
defined file organizations and record formats.
RMS promotes safe and efficient file sharing by pro-
viding multiple file access modes and automatic record
locking (where applicable). RMS offers the options of
enabling global buffers for buffer sharing by multiple pro-
cesses.
RMS utilities aid file creation and record maintenance.
These utilities convert files from one organization and
format to another; restructure indexed files for storage
and access efficiency; and reclaim data structures within
indexed files. These utilities also generate appropriate
reports.
For systems that have DECnet or DECnet-Plus in-
stalled, RMS provides a subset of file and record man-
agement services to remote network nodes. Remote file
operations are generally transparent to user programs.
Commands such as EDIT, CREATE, COPY, TYPE, and
PRINT allow users to manipulate RMS records within
RMS files at the DCL command level.
Disk and Tape Volumes
The system manager can organize disk volumes into
volume sets. Volume sets can contain a mix of disk
device types and can be extended by adding volumes.
Within a volume set, files of any organization type can
span multiple volumes. Files can be allocated to the set
as a whole (the default) or to specific volumes within
the set. Optionally, the system manager can allocate
portions of indexed files to specific areas of a single
disk or to specific volumes in a volume set.
The system manager can place quotas on a disk to con-
trol the amount of space individual users can allocate.
Quota assignment is made by UIC and can be controlled
for each individual volume set in the system (or for each
individual volume if the volume is not part of a set).
The system manager can cache disk structure infor-
mation in memory to reduce the I/O overhead required
for file management services. Although not required to
do so, users can preallocate space and control auto-
matic allocation. For example, a file can be extended
by a given number of blocks, contiguously or noncon-
tiguously, for optimal file system performance.
The system applies software validity checks and check-
sums to critical disk structure information. If a disk is
improperly dismounted because of user error or system
failure, the system rebuilds the disk’s structure informa-
tion automatically the next time the disk is mounted.
The system detects bad blocks and prevents their reuse
once the files to which the blocks were allocated are
deleted. On DIGITAL Storage Architecture (DSA) disks,
the disk controller detects and replaces bad blocks au-
tomatically.
The system provides 255 levels of named directories
and subdirectories whose contents are alphabetically or-
dered. Device and file specifications follow HP conven-
tions. Users can use logical names to abbreviate the
specifications and to make application programs device
and file name independent. Users can assign a logical
name to an entire specification, to a portion of a speci-
fication, or to another logical name.
OpenVMS supports multivolume magnetic tape files
with transparent volume switching. Access positioning
is done either by file name or by relative file position.
E-BUSINESS AND INTEGRATION TECHNOLOGIES
The HP OpenVMS e-Business and Integration Infras-
tructure Package provides key Internet, e-business,
and integration software technologies that enhance the
OpenVMS Alpha and OpenVMS for Integrity servers
operating systems and enable the development of e-
business and enterprise integration solutions. These
technologies are bundled with the OpenVMS Alpha or
OpenVMS for Integrity servers operating systems. Sev-
eral of the components are additionally bound by an
open source software license.
The following components are included on the e-
Business and Integration Infrastructure Package on
OpenVMS Alpha:
• HP Secure Web Server (SWS), including support for
the popular scripting capabilities: mod_PHP, mod_
Perl and Perl, and JavaServer Pages (Tomcat)
• HP Secure Web Browser (SWB)
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