Path: utzoo!news-server.csri.toronto.edu!rutgers!cbmvax!uunet!apexepa!sean
From: sean@apexepa.UUCP (Sean Donovan)
Newsgroups: comp.databases
Subject: Re: some questions on DBASE III +
Keywords: make it simple....
Message-ID: <112@apexepa.UUCP>
Date: 13 Mar 91 15:49:22 GMT
References: <20990@shlump.nac.dec.com>
Organization: Apex Software Corp., Pittsburgh, Pa.
Lines: 30

In article <20990@shlump.nac.dec.com> yychow@pasm07.enet.dec.com (yychow) writes:
>Hi Everyone, 
>[...] {Two questions about the affect of dbase apps running on networks.}

When you run a dbase program on a machine connected to a network, say 
from the network server, you host machine loads its own copy of dbase
and the application into its memory. This means that each machine on the
network which is running the program has its own set of work areas, file
handles, etc. These are private to the machine running the application, so
another node running the same application cannot interfere with the
operations such as select, etc.

The only thing that you must keep in mind when writing network applications
is: how and when are your .dbf files accessed. You must be aware that some
commands and functions place file and record locks on the data, which means
that your users may not be able to access it all the time. You must be aware
that the data contained within the .dbf files may have occasion to change
right under one nodes nose. In general, you have to pay specific attention
to how your application accesses and manipulates the data stored in files
shared by the application.

>[...]{Clipper question}

Sorry can't help you there, I've never run it.


Hope this helps,


Sean Donovan  uunet!apexepa!sean