Tom Schmidt wrote:
On Sun, 18 Dec 2005 14:54:15 +0100, R.S. <[EMAIL PROTECTED]>
wrote:
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.
1a) Sharing memory resource IS true if you are using z/VM, as the site
where I'm backup VM-guy is doing with its mainframe Linux workloads. They
have 24x7 (well, closer to 24x6.98 with periodic scheduled outages for non-
VM reasons). If it was important to the business to be fully up at 5am on
every Sunday morning they could achieve 24x7 but it is more important to
the business that it spend that money elsewhere.
Does it mean, the system takes memory from common pool when needed ?
Or you can configure some memory offline from one system and assign it
to another, everything without any IPL of any system (mean Linux image) ?
My humble opinion is that you can reconfigure memory between Linux
virtual machines but only when these machines are down. Maybe I'm wrong
with that.
--
Radoslaw Skorupka
Lodz, Poland
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