From: dewar@schonberg.cs.nyu.edu (Robert Dewar)
Subject: Re: Conceptual Ada Problems
Date: 1996/09/29
Date: 1996-09-29T00:00:00+00:00 [thread overview]
Message-ID: <dewar.844055564@schonberg> (raw)
In-Reply-To: 1996Sep29.194017.1@eisner
Larry said
"That sounds like an indexed file system, and Ada standards have not
included the specification of such. DEC Ada for VMS includes packages
to access the RMS indexed file system which is already present on that
operating system. I would presume that in other environments which
have an indexed file system Ada vendors likewise supply such packages
so all customers do not have to reinvent the wheel.
One could of course write a portable indexed file system in Ada,
but considering the degree of system-specific optimization generally
provided for indexed file systems, the performance of a portable
system would likely be unsatisfactory."
Actually indexed file systems like this are largely obsolete. Even in
COBOL programs, people do not use indexed file IO often any more. Instead
they interface to an appropriate data base manager (of course that DB
manager uses some kind of indexed IO, but the extra level of abstraction
is highly valuable).
next prev parent reply other threads:[~1996-09-29 0:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-09-29 0:00 Conceptual Ada Problems Vasilios Tourloupis
1996-09-29 0:00 ` Matthew Heaney
1996-09-29 0:00 ` Larry Kilgallen
1996-09-29 0:00 ` Robert Dewar [this message]
1996-10-01 0:00 ` Dale Stanbrough
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