Re: Ada DB bindings and APQ

[Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de>]

Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
: On Tue, 14 Dec 2004 18:29:16 +0000 (UTC), Georg Bauhaus wrote:
: 
:> Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
:>: On Tue, 14 Dec 2004 02:25:22 -0500, Warren W. Gay VE3WWG wrote:
:>: Yep, the first error one gets: lpq not found. libpq.a is not distributed
:>: with GNAT. This might become a problem in the future.
:> 
:> I'm not at all surprised that when I use a binding but not the bound
:> thing, I'll get an error.
: 
: Does your OS complain about all devices you could potentially attach via
: USB?

It is surprising if binding to the operating system fails.
Driver not installed?

 
:>: Yes, but from user's perspective, at least one query per connection is
:>: always necessary. In some cases the user will need more, but not so often.
:> 
:> I doubt this very much. Indeed, we have a server type application
:> that does not work at all without a connection pool, because performance
:> is affected rather drastically when you control connections.
: 
: OK, but this does not contradict my point.

When you said, "but not so often," and I said, "doubt this very much",
(then gave just one example) I wanted to say that many DBes typically
_are_ queried frequently, in Hz.

But then at the end of your post you write that you envision a distributed
application that stores data in the net. Is this the point from wich
you argue? Quoting Warren, "You seem to be at cross purposes," maybe?

Have you had a chance to study Tanenbaum's et aliorum distributed systems
reasearch (Amoeba, The Globe, ...)?
There should be plenty of information, including a language study
comparing Ada's protected objects and Orca's shared data objects
in distributed systems.

http://www.cs.vu.nl/pub/papers/[orca/]

-- Georg