FUJITSU BS2000 - Manual (Page 16)

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2.6 PCI hot plug on SX150 server
On SX150, the PCI boards of a BS2000 partition can be disabled, re-
moved, inserted or enabled during operation. This functionality can
be used for changing the configuration or for maintenance (replac-
ing a defective board without rebooting). It can be used for all
current PCI boards apart from channel connections.
2.7 Capacity on demand on SX150 servers
The capacity on demand function is available to provide an increase
in performance that is interruption-free and time-limited. In addi-
tion to the working processors that are enabled as standard, one or
more CoD processors can be used (with appropriate contractual
agreement). They are switched in or out as required during opera-
tion.
2.8 Disk sharing with S-systems
OSD/XC V2.2A provides support for device type D3435 for FibreCAT
CX400/CX600, CX500/CX700 and Symmetrix on the fibre channel connec-
tion of the SX servers. This makes it possible to share a D3435
disk connected to S-systems and SX servers via fibre channel.
2.9 MIN-MEMORY-SIZE on SX150
Important note on the MIN-MEMORY-SIZE parameter on SX150:
Under VM2000, the main memory of a VM can be expanded or reduced by
the VM2000 administrator during the current session (dynamic main
memory reconfiguration) to allow a flexible reaction to changes in
load or types of tasks without interrupting the operation of the
system. The MEMORY-SIZE operand is used to dimension the main mem-
ory of the VM when the VM is initialized (/CREATE-VM). The MIN-
MEMORY-SIZE operand in the same command can be used to specify the
minimum main memory size if the size of the domain is reduced at a
later time.
The MIN-MEMORY-SIZE must be at least the (maximum) requirement of
resident memory for running the guest system.
On SX servers, resident memory is also required for JIT compiled
code that in order to run quicker is allocated in "Big Pages" on
SX150 servers. A fix part of MEMORY-SIZE is reserved for Big Pages
and must be set via the BIG-PAGE-QUOTA startup parameter, the de-
fault value is 40%.
This implies as a rule for SX150:
MIN-MEMORY-SIZE > 1/2 MEMORY-SIZE
(if BIG-PAGE-QUOTA default is used).
This rule must not be violated, in order to avoid a systems bottle-
neck.
2.10 Software extensions of the BS2000/OSD-BC V6.0B operating system
base
You can find the functional enhancements of the BS2000/OSD-BC V6.0B
operating system base with respect to the previous version
BS2000/OSD-BC V5.0 in the Release Notice SYSFGM.BS2OSD.060.E.