John S. Giltner, Jr. wrote:
[...]
Mostly Linux on the MF was so that you could migrate what was on 10, 20,
200 Intel boxes that were sitting there 90% idle and put on a single box
and share CPU and Memeory resources.
IMHO this is marketing mantra from IBM.
1. Sharing memory resource is not true. Memory can be easily
reconfigured (taken from system A to system B), but, assuming 24x7
availability it is big advantage.
2. Usually all the servers have workload peak in the same time. They
usually form single information system.
3. Even If sharing resources could make some savings in term of
megabutes or CPU cycles, it doesn't necessarily mean any savings in
costs. CPU cycles and megabytes in PCs are much cheaper. Maybe cycles
are hard to compare, but memory price is simple to compare - megabyte
has the same meaning.
4. There is also not mentione advantage of Linux on z/machine: hardware
reliability and availability. It is hardly comparable, the only thing in
replace of RAS could be hot reserve or clustering.
--
Radoslaw Skorupka
Lodz, Poland
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
