## 1.1 Design considerations for the IBM z15 

Delivering new services efficiently and effectively with speed and at scale is crucial to any business, large or small. Managing changes and potential disruptions to the IT infrastructure while maintaining availability of services is a must. Ensuring data privacy and protection to mitigate impacts of security breaches is what every business expects from its IT infrastructure. 

There is no doubt that the technology you choose determines business success and differentiates you from the competition. Technology choices must help meet the expectations of rapid dynamic development cycles and give the confidence that new and existing services are resilient and can be delivered quickly and securely. Therefore, the correct balance of open source technologies and the IT platform on which they run is also key. 

## 1.1.1 Complementing and augmenting cloud solutions 

Today, many business use cloud technologies to deliver cloud native services at scale and at lower cost, but often the risk of vendor lock-in and escalating costs exists. Also, approximately 80% of enterprise applications and services have not yet moved to the cloud because of struggles with flexibility, connectivity, security, and management across multicloud environments. 

## 1.1.2 Compliance, resiliency, and performance 

The latest member of the IBM Z family, the z15, features a tried-and-true architecture to satisfy today’s demands. It can he lp you create an open, secure, and resilient infrastructure that streamlines your ability to integrate disparate cloud environments and create a single, cohesive IT infrastructure that provides high availability, scalability, and performance. The z15 can also help you fully protect your data (in-flight and at-rest), providing the strongest workload isolation, while facilitating regulatory compliance. 

The IBM Integrated Accelerator for zEnterprisefi Data Compression (zEDC) provides on-chip compression (processor nest compression accelerator), which supports DEFLATE-compliant compression and decompression and GZIP CRC/ZLIB Adler. Compared to the zEDC Express (PCIe feature), the z15 on-chip compression provides low latency and high bandwidth while eliminating the need for the virtualization layer. The nest accelerator is now accessible as a designed instruction, which is available for problem state programs. 

New with z15, the System Recovery Boost feature offers the customer more CP capacity during system recovery operations, such as shutdown, IPL, and stand-alone dumps, to “speed up” the recovery. The feature is embedded in the z15 firmware and is available to operating systems (opt-in for supported OS-es) to accelerate recovery from maintenance tasks by providing more CP capacity to opt in LPARs. 

For more information about System Recovery Boost, see Chapter 7, “Operating system support” on page 255. 

