(MIDAW) Facility - Messmer The Brain House
(MIDAW) Facility - Messmer The Brain House
(MIDAW) Facility - Messmer The Brain House
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Why the Mainframe?... Why NOT the Mainframe?<br />
What is the Difference between shared vs. nonshared<br />
Architecture?<br />
Appl<br />
A<br />
z/OS<br />
Appl<br />
B<br />
Appl<br />
C<br />
SHARED I/O<br />
Linux<br />
Other<br />
Applns<br />
System z server<br />
�Dynamic allocation of I/O to<br />
partitions<br />
�Full I/O sharing across<br />
partitions<br />
�CPU Shared across LPARs<br />
�High Availability<br />
�Effective Usable Capacity<br />
�Utilization up to 100%<br />
�Linux Virtual Servers<br />
Zürich | 26. Oktober 2004<br />
CROSS LPAR<br />
COMMUNICATION VIA<br />
MEMORY BUS USING<br />
HiperSockets <br />
Less<br />
Capacity<br />
needed<br />
OLTP<br />
OLTP<br />
WEB<br />
BATCH<br />
DOMINO<br />
Silvio Sasso's Corner, GSE z/OS<br />
Expertforum CH #64, 9.-10.5.2006,<br />
BI<br />
Appl Appl<br />
A<br />
B<br />
CROSS SYSTEM<br />
...<br />
COMMUNICATION VIA LAN<br />
UNIX UNIX<br />
SHARED NOTHING<br />
Appl<br />
C<br />
UNIX<br />
Common Deployments<br />
�Fixed allocation of I/O<br />
per system<br />
�Often I/O sharing<br />
across system<br />
�Fixed allocation of CPU<br />
capacity<br />
�Availability Issues<br />
�LESS Usable Capacity<br />
�Utilization per system<br />
~ 20-40%<br />
© 2004 IBM Corporation 42
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