Fujitsu Siemens Computers SX series User Manual page 319

Dynamic Reconfiguration
Virtual CPUs are implicitly reconfigured by VM2000 when Dynamic Reconfiguration
(attachment or detachment of real CPUs) takes place. If for a VM the number of active
virtual CPUs has become greater than the number of attached real CPUs in the
associated CPU pools, excess virtual CPUs are implicitly detached. By the same token
detached virtual CPUs are implicitly attached if the number of attached real CPUs in the
CPU pool has been increased by DR. Details on the number of attached real and virtual
CPUs in the CPU pool are provided in the manual
If an XSB is also equipped with memory or I/O devices and if these are to be used, the
VM2000 administrator must perform the following actions after these have been put into
operation with DR:
–
–
An XSB with usable memory and/or UHPS devices which have been put into operation
is released only when Solaris is rebooted.
An XSB with exclusive I/O devices (but without any memory or UHPS devices) can also
be released during ongoing operation if the BS2000 devices satisfy one of the following
conditions:
–
–
Note
After a DR action the RUN files for configuring the VMs may need to be adjusted.
U41272-J-Z385-3-76
Memory is not automatically distributed to the VMs.
The VM2000 administrator must therefore distribute the memory to the VMs after
DR using the commands /EXTEND-VM-MEMORY, /MOVE-VM, /CREATE-VM.
I/O devices
New devices added with DR-connect are not assigned to the VMs in the context of
DR. They must be assigned explicitly to the guest systems by the VM2000 admin-
istrator (/ADD-VM-DEVICE command) or be supplied with the privilege required for
implicit assignment (ASSIGN-BY-GUEST). The devices must then be attached quite
normally in the relevant guest systems (ATTACH).
The device is not assigned.
The device is assigned to at most one VM (i.e. is not "shared"), and it is already
DETACHED in the guest system concerned, or it can be detached implicitly in the
context of the DR request.
Performing DR
"Virtual Machine System" [14].
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