Subscribe to this informationImproving the performance of partition mobility
You can improve the partition mobility performance by installing the latest available firmware, Hardware Management Console (HMC), and the Virtual I/O Server (VIOS) software on both the source and target mover service partitions.
| POWER7® | POWER7+™ | |||
|---|---|---|---|---|
| Dedicated processing units | Shared processor virtual processing units | Dedicated processing units | Shared processor virtual processing units | |
| Single Migration | 3 | 3 | 2 | 2 |
| Up to 16 concurrent migrations | 4 | 4 | 3 | 3 |
An increase in the processor entitlement might be required to increase the number of virtual processing units. If you are using a 1 GB network adapter, or if the bandwidth of the 10 GB network adapter links that are to be used for partition mobility reach peak levels (near 100% utilization), one more POWER7 or POWER7+ processing unit or virtual processing unit is recommended for improving the performance, regardless of the number of concurrent migrations.
You can use 1 GB of extra memory when you use a 10 GB network adapter for partition mobility. You do not require extra memory when you are using 1 GB network adapter.
- Enable the Large Send and Large Receive Offload options on all network devices that are involved in partition mobility.
- Set tcp_sendspace = 524288 and tcp_recvspace = 524288.
- Enable the Jumbo Frames option if the environment supports the option.
In some instances, few operating system levels of the client partition allows the partition state to be transferred more efficiently during the migration process. The minimum AIX® level that supports the transfer of a partition state is AIX 6.1 Technology Level 4.
- AIX 6.1 Technology Level 8.
- AIX 7.1 Technology Level 2.
