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The Question is:
I need to find out about the GALAXY. I know that with GALAXY, I can drag and
drop CPU from one QBB to another QBB. The problem is, do the GALAXY move the
I/O too? I am afraid the bottleneck still woth the I/O if I move CPU or
memory? The second thing, if
I have one or more CPU faulty in one QBB, how do I replace it? Do I need to
shutdown the box or just the QBB? Do the CPU support hot swap?
The Answer is :
Please visit the OpenVMS Galaxy portion of the OpenVMS website, and
please contact Cerner for information on Cerner products and Cerner
recommendations.
Various types of I/O controllers can have their interrupts targeted
to specific processors, this is known as Fast Path. So yes, you can
potentially (re)target your I/O across available processors. (You
will want to consider the configuration from the individual partitions,
and view the transfer of a processor from one partition to another as
simply issuing a STOP/CPU in one partition, and then using START/CPU
in another. There is far more involved here of course.)
The specifics of swapping and power-down requirements depend directly
on the particular processor platform involved. OpenVMS Galaxy is also
not a hardware fault-tolerant environment; a processor hardware fault
can potentially cause the failures of one or more software instances.
(The console will then configure around a hard failure of a processor,
and will permit the system(s) to reboot with the remaining processor(s).)
The specifics of the Fast Path I/O also depends on the OpenVMS version
and the specific controllers involved -- specific high-volume controllers
have support for Fast Path on specific OpenVMS versions.
The OpenVMS Galaxy configuration utility (GCU) is aware of Fast Path,
and will not permit a processor that is a Fast Path target to move.
Further, the GCU is also cogniscent of what components need to be
powered down within a particular platform, should component hardware
need to be swapped. (In older hardware systems running OpenVMS Galaxy,
the power-down domain is always the entire system.)
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