On 21/5/2023 1:51 am, Tom Brennan wrote:
I'm not talking about 20 years ago.
You said, "Walmart used to have multiple mainframes"
Implication: They currently have only 1 or zero.
That's not the case, and I think you would be surprised at the count.
I can make an educated guess at two: one for production/development
purposes and another for disaster recovery. During my time in the 90s at
British Telecom, they were the largest mainframe customer in the UK.
They operated 32 data centers across the country, with an impressive six
located in London alone. The latest information I have suggests that
they now maintain two data centers in London specifically for running
legacy applications, one of them is a DR machine. The billing system I
used to work on has since been replaced. Previously, they had a
dedicated global billing unit that developed custom systems. However, it
seems they have transitioned to off-the-shelf solutions capable of
real-time billing, eliminating the need for overnight batch processing.
I appreciate that you are someone who values realism, Tom.
On 5/20/2023 10:31 AM, Bill Johnson wrote:
I’ll guarantee the current count is less than 20 years ago.
Sent from Yahoo Mail for iPhone
On Saturday, May 20, 2023, 1:17 PM, Tom Brennan
<t...@tombrennansoftware.com> wrote:
Used to have multiple mainframes? You might be surprised at the current
count. But like any good company, they are always looking for cost
savings, depending on the risk of course.
On 5/20/2023 9:49 AM, Bill Johnson wrote:
Walmart used to have multiple mainframes. Because the mainframe has
evolved, they need fewer mainframes to perform Walmart’s growing
business. Also need fewer mainframe support personnel. Does that
mean the mainframe is not growing?
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On Saturday, May 20, 2023, 11:17 AM, zMan <zedgarhoo...@gmail.com>
wrote:
Alas, this is patently false. The number of MIPS may be growing, but
the
number of boxes, shops, and applications is clearly dropping. When
was the
last time a new mainframe customer joined this list? Why are the
parking
lot and floor in POK empty all the time?
I sure wish it wasn't so, but all the real-world evidence says it
is, alas.
Asserting otherwise is wishful thinking unsupported by the evidence.
A better use of energy is looking for ways to keep the platform
vibrant.
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