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- From: erick@demorgan.uwaterloo.ca (Erick Engelke)
- Subject: Re: Mission Critical Apps & MS-Windows
- Message-ID: <C0r5BC.FMI@watserv1.uwaterloo.ca>
- Sender: news@watserv1.uwaterloo.ca
- Organization: University of Waterloo
- References: <1ijs9sINNsqm@mirror.digex.com>
- Date: Tue, 12 Jan 1993 17:45:10 GMT
- Lines: 56
-
- nicklas@access.digex.com (Randolph C Nicklas) writes:
- >My company is considering using Windows 3.1 (W3.1) for a mission
- >critical application.
-
- >Mission critical in general are applications
- >such as nuclear reactor systems, air traffic control systems, and
- >manned space flight systems. Mission critical in our application
- >means real-time, multiply concurrent applications consisting of
- >custom-built W3.1 applications, commercially-off-the-shelf (COTS)
- >products, ethernet LAN programs with both incoming and outgoing
- >traffic, older custom-built DOS applications, and X-Windows
- >displays exported from X-applications on the LAN for monitoring and
- >controlling a fleet of up to 25 publicly used communications
- >satellites. This W3.1 user station is the only access point into
- >a distributed computing environment of over 40 server machines; if
- >the user station malfunctions there is no other alternative access
- >available. Our design is primarily using W3.1 as a client to
- >several UNIX servers over the ethernet LAN.
-
- A mission critical system as you describe needs much more than
- Windows + Ethernet as a single access point.
-
- Windows is unstable at best, reboots are not an option but one
- slight problem can and will crash the PC without any reasonable
- form of protection. Also, the versions keep getting released
- well before developers can rigorously test their networking
- subsystems and user applications. So users must have some way
- to quickly gain control from a second station because waiting
- for a reboot is often not option.
-
- Being a network developer and knowing many others at the
- various companies, we are weary of recommending windows
- to users and very few of us have suggested it function as even a
- fileserver. Enough people complain when fileservice is
- unreliable or even slow, imagine the response to an unreliable
- service when it affects safety.
-
- You should also consider multiple redundant LANs because lives
- are at stake and networks fail. Heck, redundant systems are
- common place for any critical system such as stock exchanges, etc.
-
- OS/2 and probably NT (when it becomes available) offer much more in
- the way of reliability. I have managed to crash OS/2 when it should
- have trapped the errors, but that's far better than countless
- times when Windows crashes without apparent reason.
-
- Them's my opinions, but I know they are shared by many of my peers
- who cannot say them publically because doing so would tend to make
- people think their products were less reliable than their competition's.
-
-
- Erick
- --
- ----------------------------------------------------------------------------
- Erick Engelke WATTCP Architect
- erick@development.uwaterloo.ca TCP/IP was easy but i still can't work VI
-