F.1 Overview F.2 zEDC Express The growth of data that must be captured, transferred, and stored for large periods is  unrelenting. In addition, software-implemented compression algorithms can be costly in terms  of processor resources and storage costs. zEDC Express, which is an optional feature available for z14, z13, z13s, zEC12, and zBC12  servers, addresses these requirements by providing hardware-based acceleration for data  compression and decompression. zEDC provides data compression with lower CPU  consumption than compression technology that was available on the IBM Z server. The use of the zEDC Express feature with the z/OS V2R1 zEnterprise Data Compression  acceleration capability (or later releases) is designed to deliver an integrated solution. It helps  reduce CPU consumption, optimize the performance of compression-related tasks, and  enable more efficient use of storage resources. This solution provides a lower cost of  computing and also helps to optimize the cross-platform exchange of data. zEDC Express is an optional feature (FC #0420). It is designed to provide hardware-based  acceleration for data compression and decompression.  The feature installs exclusively on the Peripheral Component Interconnect Express (PCIe) I/O  drawer. A total of 1 - 8 features can be installed on the system. One PCIe adapter or  compression coprocessor is available per feature, which implements compression as defined  by RFC1951 (DEFLATE). A zEDC Express feature can be shared by up to 15 logical partitions (LPARs) on the same  CPC. Adapter support for zEDC is provided by Resource Group (RG) code that runs on the  system-integrated firmware processor (IFP). The recommended high availability configuration  per server is four features. This configuration provides continuous availability during  concurrent update.  For resilience, the z14 system always includes four independent RGs on the system, which  shares the IFP. Install a minimum of two zEDC features for resilience and throughput. 512  IBM z14 (3906) Technical Guide