HP-UX Virtual Partitions 6.0 Administrator Guide

of the vPars is less than 8 GB at all times. The peaks of the vPars bandwidth requirements should
not intersect as it may result in an unpredictable performance.
LORA support
Locality-Optimized Resource Alignment (LORA) support provides the vPars processor core selection
algorithms to enable CPU allocation based on memory proximity to the partition. This enables vPar
systems to produce better data transfer rate and reduce time to access memory, therefore enhancing
the performance significantly for vPars on multi-cell Integrity systems. An administrator or a user
can configure vPars using the vparcreate command to assign the count of CPUs and the amount
of memory to the vPar. The resource allocator in the VSP uses the locality information of the available
resource to select the best resources for the vPar. Unlike earlier vPars, the assignment of resources
is performed at the time when the vPar is activated, rather than when it is created.
To allocate CPU cores and memory with the lowest latency, vPars v6.0 contains a resource allocator
that uses knowledge of Non-uniform Memory Access. With this functionality the need for other
methods of resource specification (by path or cell) are no longer necessary.
Configuring vPars for LORA Support
In vPars v6.0, there is no specific configuration required. After you create and activate the vPars,
the resource allocator selects the best available resources.
For optimal performance, ensure that the VSP is configured with 7/8 SLM and 1/8 ILM ratio, that
is, 7/8 of the total memory as SLM and 1/8 of the total memory as ILM. On BL8x0c blades you
must set the memory using the memconfig -mi command at the EFI prompt. Specify the memory
interleave value MostlyNUMA.
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