> Regarding mainframe - they simply don't need big reliable machine,
because they built their infrastructure on plenty of small, cheap and
not very reliable PCs.
This is accurate.
Cloud based service providers take HA to the extreme, even intentionally
killing otherwise healthy servers or services just to force a failover
(which consistently works, giving them smug confirmation of their
methods). Acorse the design is way different from ours: no such thing as
a long running COBOL job in that world.
z/OS is one of a handful of systems which continue to provide
_integrated reliability_. (Keep in mind our mainframe term "RAS".)
z/OS also has the value of longevity (for application code). New
applications are rarely built on or for z/OS, though many might use Z
hardware (either Linux or USS) when needing heavy I/O or other
scalability or that lovely integrated reliability. As always, "it depends".
-- R; <><
On 10/24/25 9:59 AM, Radoslaw Skorupka wrote:
That's wrong answer.
Yes, Google don't buy PC servers.
However they don't make anything. They buy CPUs. Including IBM POWER
(a lot of).
They produce their own *cheap servers* even with no enclosure.
Obviously (or not) they don't produce motherboards... but IBM don't do
it as well. They also buy hard drives, but they don't produce them.
Regarding mainframe - they simply don't need big reliable machine,
because they built their infrastructure on plenty of small, cheap and
not very reliable PCs.
--
-- R; <><
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