General Guidelines; Hardware Configuration Definition; Coupling Links; Large - IBM z13s Technical Manual

7.6.1 General guidelines

The IBM z13s introduces the latest z Systems technology. Although support is provided by
z/OS starting with z/OS V1R12, use of z13s depends on the z/OS release. z/OS.e is
supported on z13s.
In general, consider the following guidelines:
Do not change software releases and hardware at the same time.
Keep members of the sysplex at the same software level, except during brief migration
periods.
Migrate to an STP-only network before introducing a z13s into a sysplex.
Review z13s restrictions and migration considerations before creating an upgrade plan.

7.6.2 Hardware configuration definition

On z/OS V1R12 and later, the HCD or Hardware Configuration Manager (HCM) helps define
a configuration for z13s.

7.6.3 Coupling links

Each system can use internal coupling links, InfiniBand coupling links, or ICA coupling links
independently of what other systems are using. z13s does not support participating in a
Parallel Sysplex with System z10 and earlier systems.
Coupling connectivity is available only when other systems also support the same type of
coupling. When you plan to use the InfiniBand coupling or ICA coupling links technology,
consult the Coupling Facility Configuration Options white paper, which is available at the
following website:
http://www.ibm.com/systems/z/advantages/pso/whitepaper.html
7.6.4 Large page support
The large page support function must not be enabled without the respective software support.
If large page is not specified, page frames are allocated at the current size of 4 K.
In z/OS V1R9 and later, the amount of memory to be reserved for large page support is
defined by using the LFAREA parameter in the IEASYSxx member of SYS1.PARMLIB:
LFAREA=xx%|xxxxxxM|xxxxxxG
The parameter indicates the amount of storage in percentage, megabytes, or gigabytes. The
value cannot be changed dynamically.

7.6.5 Capacity Provisioning Manager

The installation of the capacity provision function on z/OS requires the following prerequisites:
Setting up and customizing z/OS RMF, including the Distributed Data Server (DDS)
Setting up the z/OS CIM Server (included in z/OS base)
Performing capacity provisioning customization, as described in z/OS MVS Capacity
Provisioning User's Guide, SA33-8299
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