10
PTFs. To remove this dependency, two host partitions can be used to simultaneously provide
virtual storage to one or more client partitions.
The configuration for two hosts for the same client partition uses the same concepts as that for a
single host described in section 2.2. In addition, a second virtual SCSI client adapter exists in the
client LPAR, connected to a virtual SCSI server adapter in the second host LPAR. The IBM i
configuration of the second host mimics that of the first host, with the same number of NWSD and
NWSSTG objects, and NWSSG objects of the same size. As a result, the client partition
recognizes a second set of virtual disks of the same number and size. To achieve redundancy,
adapter-level mirroring is used between the two sets of storage spaces from the two hosts. Thus,
if a host partition fails or is taken down for maintenance, mirroring will be suspended, but the
client partition will continue to operate. When the inactive host is either recovered or restarted,
mirroring can be resumed.
5. Implementing IBM i client LPARs with an IBM i host
Installing IBM i in a client LPAR with an IBM i host consists of two main phases:
•
Creating the virtual SCSI configuration in the HMC
•
Creating the NWSSTG and NWSD objects in the IBM i host partition, and activating the
new client partition
The implementation steps are described in detail in the topic
Creating an IBM i logical partition
that uses IBM i virtual I/O resources using the HMC
in the
Power Systems Logical Partitioning
Guide
: http://publib.boulder.ibm.com/infocenter/systems/scope/hw/topic/iphat/iphat.pdf. Note that
sufficient available capacity is required in the IBM i host partition to create the storage space
objects. When following the detailed implementation instructions, keep in mind the performance
recommendations in section 4.2 of this document.
6. Post-install tasks and considerations
6.1. Configure IBM i networking
Once the IBM i client partition is installed and running, the first system management step is to
configure networking. There are three types of network adapters that can be assigned to an IBM
i client partition:
•
A standard physical network adapter in a PCI slot
•
A logical port on a Host Ethernet Adapter (HEA)
•
A virtual Ethernet adapter
Note that both physical and virtual I/O resources can be assigned to an IBM i virtual client
partition. If a physical network adapter was not assigned to the IBM i client partition when it was
first created, see the topic
Managing physical I/O devices and slots dynamically using the
HMC
in the
Power Systems Logical Partitioning Guide
(http://publib.boulder.ibm.com/infocenter/systems/scope/hw/topic/iphat/iphat.pdf) to assign an
available adapter.
An IBM i client partition can also use the new HEA capability of POWER6 processor-based
servers. To assign a logical port (LHEA) on an HEA to an IBM i client partition, see the topic
Creating a Logical Host Ethernet Adapter for a running logical partition using the HMC
in
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