Specifications

276 IBM Flex System p260 and p460 Planning and Implementation Guide
7.1 PowerVM
PowerVM delivers industrial-strength virtualization for AIX, IBM i, and Linux
environments on IBM POWER processor-based systems. Power Systems
servers, coupled with PowerVM technology, are designed to help clients build a
dynamic infrastructure, which reduces costs, manages risk, and improves
service levels.
7.1.1 Features
The latest version of PowerVM contains the following features:
򐂰 Support for the following number of maximum virtual servers (or logical
partitions, LPARs):
– p260: Up to 160 virtual servers
– p460: Up to 320 virtual servers
– p24L: Up to 120 virtual servers
򐂰 Role Based Access Control (RBAC)
RBAC brings an added level of security and flexibility in the administration of
the Virtual I/O Server (VIOS). With RBAC, you can create a set of
authorizations for the user management commands. You can assign these
authorizations to a role named UserManagement, and this role can be given
to any other user. So one user with the role, UserManagement, can manage
the users on the system, but does not have any further access.
With RBAC, the VIOS can split management functions that presently can be
done only by the
padmin user, providing better security by giving only the
necessary access to users, and easy management and auditing of system
functions.
򐂰 Suspend/Resume
Using Suspend/Resume, you can provide long-term suspension (greater than
5 - 10 seconds) of partitions, saving partition state (memory, NVRAM, and
VSP state) on persistent storage. This action makes server resources
available that were in use by that partition, restoring partition state to server
resources, and resuming operation of that partition and its applications, either
on the same server or on another server.
The requirements for Suspend/Resume dictate that all resources must be
virtualized before suspending a partition. If the partition is resumed on
another server, then the shared external I/O (disk and local area network
(LAN)) needs to remain identical. Suspend/Resume works with AIX and Linux
workloads when managed by the Hardware Management Console (HMC).