Chapter 4. Reliability, availability, and serviceability
115
Take advantage of server optimization:
– Consolidation: You can consolidate workloads that run on several small, underused
servers onto a single large server.
– Optimized placement: You can move workloads from server to server to optimize
resource use and workload performance within your computing environment. With live
partition mobility, you can manage workloads with minimal downtime.
Live Partition Mobility can be completed between two systems that are managed by the same
HMC. It is also possible to migrate partitions between two systems that are managed by
different HMCs, which must be connected through a network.
Management through an HMC is optional for Power E850C servers. For systems managed by
the IVM, partitions can only be migrated to other servers that are managed through an IVM,
and these systems must be connected through a network.
Hardware and operating system requirements for Live Partition Mobility
Live Partition Mobility is supported by PowerVM Enterprise Edition in compliance with all
operating systems that are compatible with POWER8 technology.
Logical partitions can only be relocated by using Live Partition Mobility if they are running in a
fully virtualized environment, using external storage, which is accessible to both the exiting
host server and the destination server.
VIOS partitions cannot be migrated.
For more information about Live Partition Mobility and how to implement it, see
IBM PowerVM
Live Partition Mobility, SG24-7460.
4.5 Serviceability
The purpose of serviceability is to repair or upgrade the system while attempting to minimize
or eliminate service cost (within budget objectives) and maintaining application availability
and high customer satisfaction. Serviceability includes system installation, miscellaneous
equipment specification (MES) system upgrades and downgrades, and system maintenance
or repair. Depending on the system and warranty contract, service might be performed by the
Server Evacuation: This PowerVM function allows you to perform a Server Evacuation
operation. Server Evacuation is used to move all migration-capable LPARs from one
system to another if no active migrations are in progress on the source or the target
servers.
With the Server Evacuation feature, multiple migrations can occur based on the
concurrency setting of the HMC. Migrations are performed as sets, with the next set of
migrations starting when the previous set completes. Any upgrade or maintenance
operations can be performed after all the partitions are migrated and the source system is
powered off.
You can migrate all the migration-capable AIX, IBM i, and Linux partitions from the source
server to the destination server by running the following command from the HMC
command line:
migrlpar -o m -m source_server -t target_server --all
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