They will use a combination of all sorts of technologies.. and its no longer a "mainframe".. it will be on servers.
No, they actually still run a mainframe for the back end processing.
The code must be a disaster to work through.
it will be on servers.
Rarely for their back-end systems
In fact its a lot easier to read & understand.
I suppose you do have a point....
Though I have heard of a few companies (mostly international) that have virtualised their mainframe systems somehow onto regular commodity servers.
Crazy how old stuff just works.
Crazy how old stuff just works.
They did not have the luxury of virtualization as we do, so they have to get it right the first time.
Plus the stress and workload at that time was not high, so they had plenty of time to think and plan properly.
Hehe. Indeed. Memories.Not quite: IBM introduced VMs in 1972. I used a 3090 running VM with several operating systems virtualised in 1984.
http://en.wikipedia.org/wiki/VM_(operating_system)
The current version - z/VM - "... supports large numbers (thousands) of Linux virtual machines"
http://en.wikipedia.org/wiki/Z/VM
Hehe. Indeed. Memories.
VM. MVS. CICS. DB2. 3090s with 3370/80 DASD. CPU complex with TCM (Thermal Conduction Module), water-cooled, with pressurized helium. Fibre Channel. All good stuff from the 80s and 90s that just works and works and works. MIPS is only one small element in throughput. Kids today have no idea.![]()