Why OpenVMS is better than linux ...
From:Date: 10/30/02
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Date: 29 Oct 2002 19:29:29 -0800
Why OpenVMS ?
OpenVMS is the most well designed computer operating system in the
world. It is very popular in environments where stability,
reliability, high performance, disaster tolerance, security,
scalebility and clustering are required.
Here are some facts:
Multi-user interactive user support, full shared-resources clustering,
uptime, robust file system with individual volume limits circa one
terabyte (and thousands of volumes), huge system performance and
application scaling, networked GUI interface, 64-bit flat virtual
addressing, built-in tools for local backup and recovery, far better
"DLL-like" support for modular coding and distributions, built-in
record management support (heirarchical database), rolling upgrades of
layered products and the operating system in cluster environments
(continuous uptime, even with software upgrades), built-in batch-print
capabilities, support for a variety of networking protocols (COM, SMB,
NFS, IP, DECnet, X.25, http, etc), remote network system logins,
built-in system dump and analysis facilities, built-in multi-user
security and auditing, built-in multiple and mixed-language
programming capabilities, good documentation, orderable CD-ROM source
listings of the operating system internals and source code, process
and engineering that targets the avoidance of introducing security
problems and typical virus infection paths, built-in system tuning
tools, built-in application debugging and application dump tools,
support for symmetric multiprocessing environments of up to 32 CPUs in
a single system (and up to 96+ nodes in a cluster), built-in standard
product installation tools and associated product installation
packaging tools, a central goal of upward-compatibility of user-mode
applications and tools over OpenVMS releases, support for systems with
256 gigabytes of physical memory, available full operating system and
hardware support from a single source, powerfull and easy to use
no-nonsense user interface, etc.
Continuous OpenVMS system uptimes of over ten years are not unheard
of. Some of these systems -- those configured in clusters -- can be
running current OpenVMS releases, with very long cluster uptimes, with
the rolling-upgrade capabilities.
OpenVMS has more than 450,000 installed systems with over 10 million
users.
OpenVMS is the #1 rated operating system in the healthcare industry.
More than 90% of the world's CPU chips are manufactured on lines
running OpenVMS.
More than 50% of the world's cellular phone billing systems run
OpenVMS.
More than 95% of the world's top financial exchanges run on OpenVMS or
Tandem systems.
For these reasons OpenVMS is used in many production environments and
financial and medical institutions where non-interruptability and
continuous computing (24*365) are an important issue. Military
contractors also accept it as the one and only operating system for
providing maximum security with maximum numerical throughput.
Still today many other operating systems have tried to come up to its
level, but none of them come even close to the many qualities and
advantages of OpenVMS.
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