Fujitsu BS2000, Руководство пользователя

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Virtualization Architecture and strategies
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U41855-J-Z125-3-76
2.7.2.1 CPU pool management
The real CPUs of the Server Unit x86 are distributed to groups of CPUs, which are known
as CPU pools. Each real CPU can be assigned to at most one CPU pool.
One main objective of this distribution to different CPU pools is to seal off the carrier system
from the other systems and to separate the Native BS2000 system (or the BS2000 guest
systems) from the XenVM guest systems. For the operation of BS2000 this ensures a
stable performance in accordance with the SE server model.
A virtual machine (VM) is assigned permanently to a CPU pool in accordance with the VM
type (BS2000 VM or XenVM) when it is generated. It can use only the CPUs from this CPU
pool, even if CPUs in parallel CPU pools are unused. The scheduling of CPU performance
always relates only to the CPUs of a particular CPU pool. The weightings between
individual VMs (via limitation and weight) in a CPU pool can thus not influence the
weightings among the VMs in another CPU pool.
The distribution of the real CPUs to CPU pools is implemented automatically on the basis
of the installed hardware and the installed licenses when the Server Unit x86 is started up
and cannot be changed by the user. The CPU pools can be extended by integrating further
hardware or by installing further licenses.
The BS2000 CPUs, i.e. those CPUs which are used by the BS2000 systems in accordance
with the server model, can be split into further CPU pools using VM2000 means.
The hardware and licenses are installed by Customer Support, and this requires a
maintenance window.
In normal operation the CPU pools are configured and managed as follows:
●
Pool 0
This pool is reserved exclusively for the X2000 basic system. It contains a quarter of the
existing real CPUs, but at least 2 CPUs.
●
BS2000 pools
The standard pool is used exclusively by the Native BS2000 system or by the BS2000
VMs. Provided no further BS2000 CPU pools are configured, this pool contains all the
BS2000 CPUs.
When further CPU pools are configured with VM2000 means, the BS2000 CPUs can
be displayed in other BS2000 CPU pools. The standard pool is retained in this case, but
may possibly no longer contain CPUs. BS2000 VMs are assigned to one of these CPU
pools when they are created. In ongoing operation, VM2000 means can be used to
switch them dynamically between these pools.