HP 9000 rp7410 HP-UX 11i v3 Dynamic nPartitions - Features and Configuration R - Page 9

sessions, or similar measures. Various capacity planning tools are available to match workloads to hardware resource levels. These considerations apply particularly to the Oracle Database products. If the memory allocated to the Oracle Database is based on the full complement of cells in the partition, then the system will not perform well if cells were to be deactivated. Instead, it would be appropriate to use the Oracle tuning mechanisms, for example, the sga_target parameter, to make the memory footprint of the database consistent with the size of the memory that will remain after cells are deactivated. Current limits and conditions Rollout of Dynamic nPartitions functionality in HP-UX 11i v3 Dynamic nPartitions operations will be available with HP-UX 11i v3 Update 1. HP-UX 11i v3 will run successfully on servers that predate the release of the update. However, the new Dynamic nPartitions operations will not be functional unless the firmware on the server is upgraded to the firmware that supports the new features. The minimum firmware version for each platform that supports Dynamic nPartitions is shown in the Firmware Matrix. Dynamic nPartitions, virtual partitions, and Integrity Virtual Machines HP-UX 11i v3 Virtual Partitions enable dynamic operation through processor and memory migration among vPars. However, Dynamic nPartitions operations cannot be performed to an nPartition that is running vPars. Integrity Virtual Machines also enable dynamic operation through processor and memory migration among guest instances. However, the Integrity Virtual Machines Platform Manager as of September 2007 is based on HP-UX 11i v2. Therefore, Dynamic nPartitions operations cannot be performed to an nPartition that is running Integrity Virtual Machines. Requirement to reset Workload Manager Workload Manager (WLM) exercises control over the hardware resources in a partition or a set of partitions. WLM uses its own algorithms to adjust hardware resources to meet the stipulated service levels. Those algorithms are perturbed if the system administrator uses Dynamic nPartitions to change the composition of partitions being managed by WLM. Therefore, in cases where WLM is being used, it is necessary to shut down the tool before a Dynamic nPartitions operation and restart the tool after the operation completes. The situation is similar with the global Workload Manager (gWLM). gWLM expects to have complete control of the CPUs, or cores, available on a system. However, when you must make manual adjustments to system resources, you can do so as follows: 1. Undeploy the SRD containing the systems that you want to adjust 2. Perform the Dynamic nPartitions operations 3. Re-create and re-deploy the SRD Integration with instant capacity Dynamic nPartitions is fully integrated with instant capacity functionality. Any processor licensing restrictions imposed by instant capacity are respected by Dynamic nPartitions. For that reason, a cell online activation operation is possible only if there is at least one processor license available in the cellular complex. 9