Speed Boost is a capability of System Recovery Boost that improves the recovery time of exploiting operating systems when running on a subcapacity CPC.

If you are running on a subcapacity CPC, then while System Recovery Boost is active, z/OS will request that the CPC firmware increase the CP speed of the image to full capacity model speed for the duration of the boost. After the boost ends, the image will return to the subcapacity model speed.

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If your system has z Integrated Information Processors (zIIPs), then zIIP Boost can improve z/OS recovery time, assuming zIIP capacity is available to the image.

z/OS is the only operating system that can exploit the zIIP Boost capability, as it’s the only OS that can natively exploit zIIPs. While zIIP Boost is active, z/OS will make non-zIIP eligible work zIIP eligible, thus allowing most work to run on zIIPs if there isn’t sufficient CP capacity available. This provides additional capacity and parallelism to accelerate processing during the boost periods. IBM refersto this as blurring the CPs and zIIPs together.

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As part of GDPS 4.2 the system infrastructure management has been improved, allowing a reduction in the observed RTO when there is a need for the IT infrastructure to be reconfigured. This is the case in scenarios such as on-site system restart, planned site or region switch, or in case of a disaster recovery process. This has been achieved by optimizing GDPS & CPC interactions and by providing the possibility for customers to perform actions against a group of System/LPARs rather than against each one individually.

Before this change, all actions were done sequentially, repeating in each step the required handshaking between GDPS and the CPCs hosting the systems. Grouping the actions eliminates the duplicate handshaking processes and reduces substantially the overall time needed to manage multiple systems. Early testing of these changes has demonstrated an improvement of between 30% and 60%, depending on the numbers of CPCs, number of system/LPARs managed, and CPC models.

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