Why is VMS so good?
Joe Bednorz sent me
a couple of mail
messages where he writes what he feels about VMS, and it pretty much
compare to my feelings about it. Here's a summary:
There are several things that make up a good OS, and VMS has most
of the features:
User available features:
- Very good documentation.
- Very good help for users.
- Consistent commands and command names (like SET to do
all kinds of settings), and one CLI with all the features
you might need (who needs sh or bash, or tcsh for that matter?).
- Consistently made editors!
- Logical names, definable on system level as well as on personal
- Error codes that are consistent, and uniquely identifies the
problem at hand! And mapped to them, messages that have a meaning.
And also the ability to have sub-error codes and sub-sub-error codes.
- A great debugger.
- The common language independent routine libraries.
- All kinds of extra products to help you when building programs,
link MMS, CMS, FMS, ...
- The file system, RMS! It includes indexed files, which can be changed
by several users at the same time.
- A robust file system!
- No partitions (there's no need!)
- No need for suid and sgid bits.
- A backup utility that can handle and get past tape errors (and even
recover the erroneous bits).
- Backup dates on files!
- Computer interoperability over networks (clusters, even competing
companies will admit to the superiority of Digital VAXcluster
(which should really be called VMScluster)).
- SECURITY! ("What? No world-readable passwd file?")
- All kinds of monitor capabilities.
- Process privileges! You can delegate responsibility in small
parts! No need to give the lowly operator access to the whole
system ("What? No 'root'?").
- Rights identifiers! Give selected users (from many groups) the
possibility to share a project, account-wise and so on.
This page was made by Richard Levitte <email@example.com>, Levitte Programming
Last modified: Mon Jan 28 22:43:51 CET 2002