Sujet : Re: Bootcamp
De : arne (at) *nospam* vajhoej.dk (Arne Vajhøj)
Groupes : comp.os.vmsDate : 12. Jul 2025, 15:41:01
Autres entêtes
Organisation : SunSITE.dk - Supporting Open source
Message-ID : <687273fd$0$687$14726298@news.sunsite.dk>
References : 1 2 3 4 5 6 7 8
User-Agent : Mozilla Thunderbird
On 7/12/2025 9:35 AM, bill wrote:
On 7/11/2025 8:16 PM, Arne Vajhøj wrote:
The idea of a 1:1 port is usually bad. Yes - you can implement the
exact same flow of your Cobol application in Java/C++/Go/C#,
but that only solves a language problem not an architecture problem.
The biggest problem with this the idea of going from a domain specific
language to a general purpose language. While you can write an IS in
pretty much any language (imagine rewriting the entire government
payroll currently in COBOL in BASIC!!) there were real advantages to
having domain specific languages. But then, no one today seems to even
consider things like efficiency. Just throw more hardware at the
problem.
That argument made sense 40 years ago, but I don't think there
is much point today - the modern languages have the features
the need like easy database access and decimal data type and
the missing features like terminal screen and reporting are no
longer needed.
You need to re-architect the solution: from ISAM to RDBMS,
This is the only one I totally agree with but the original problem
had nothing to do with the language. It had to do with the fact that
RDBMS wasn't around when COBOL was written. I have been doing COBOL
and RDBMS since 1980 and it was old code when I got there.
True.
But it is still a relevant example of where 1:1 will go wrong. If
you have a Cobol system using ISAM files, then do not want to convert
it to a Java/C++/Go/C# system using ISAM files.
from vertical app scaling to horizontal app scaling,
Not really sure what this means. :-)
You can call it cluster support.
If you run out of CPU power, then instead of upgrading from a
big expensive box to a very big very expensive box then you just
add a cluster node more.
from 5x16 to
7x24 operations etc..
Certainly don't get this. Every place I ever saw COBOL was 24/7 and
that is going back to at least 1972.
I would be surprised if you have never experienced a financial
institution operating with a "transaction will be completed
next day" model.
Arne