Not taken from the memory you pay for....
Just like women...
No matter what, you're gonna pay <G>
It should be...
Not taken from the memory advertised for the box.
So...is 2 GB sufficient?
I'm thinking of the large shops...
60 LPARs
Thousands of 3390s under the DS8000 shared across all lpars.
Dozens of OSA cards..
Each card with 4 ports (gb ethernet in this case)
Each port with 768 IP addresses
Each address requiring 3 mainframe addresses
All shared across all lpars.
Is 2 GB enough?
Which gets me into another tangent....
On my z890, other than wasting memory. Is there any performance considerations
if you do share all devices (that you can) across all lpars?
For example, with our DS6800. I defined about 600 volumes so far. All volumes
are shared across 4 lpars.
If a volid starts with VM*, it is varied on to the 390 LPAR.
If a volid starts with L0*, it is varied on to the 1st Linux LPAR
If a volid starts with L1*, it is varied on to the 2nd Linux LPAR
If a volid starts with L2*, it is varied on to the 3rd Linux LPAR.
The second and third Linux LPARs are started yet. Just there for the future.
So I have 600 * 4 = 2400 thingies (a technical term).
Same thing with the OSA adapters.
Just wondering....From a management option, this is better. My time vs
additional main memory (until I need the memory). But I wonder if there is a
slight performance hit, with having so many thingies (there is that technical
term again), to manage, especially if 90+% of them are not being used.
Tom Duerbusch
THD Consulting
>>> Alan Altmark <[EMAIL PROTECTED]> 6/26/2007 12:57 PM >>>
My understanding is that the memory dedicated to the HSA on a z9 [no
slashes in hardware, please] is (a) always 2GB, and (b) not taken from the
memory that you pay for.
So, it's a trick question. :-)
Alan Altmark
z/VM Development
IBM Endicott
