With z/OS V2R2, Communications Server brings enhancements in a number of areas, including scalability, simplification, and autonomics.
If there is a single, overarching theme in z/OS V2R2 CS, it is scalability. By enabling the TCP/IP stack and its strategic device drivers to utilize 64-bit (above the bar) storage,a substantial inhibitor to workload growth is relieved. Extremely large Enterprise Extender implementations benefit from internal optimizations to allow scaling to tens of thousands of connections per LPAR. And a substantially restructured IKE daemon provides a significant reduction in the time necessary to establish a large number of VPN connections.
Shared Memory Communications over RDMA (SMC-R), first introduced in V2R1 and on the zEC12/zBC12, is also enhanced in V2R2. Most significant is the ability to share the RoCE adapter, with a single adapter shareable by up to 31 virtual servers (LPARs or second level guests under zVM®). (This enhancement requires an IBM z13, and is also available via PTF on z/OS V2R1.) Are you unclear on how SMC-R will benefit your environment? A new SMC Applicability Tool is provided which will provide a projection of what percentage of your current traffic could benefit from SMC-R enablement. (This tool is also available via PTF on V1R13 and V2R1.)
The IBM Configuration Assistant for z/OS Communications Server has long been a valuable tool for configuring policy-based networking functions such as AT-TLS, IPSec, and Intrusion Detection Services. In V2R2, the Configuration Assistant gains an entirely new discipline: the ability to configure a TCP/IP profile, allowing a graphical interface and wizard-driven approach to configuring a TCP/IP stack.
There are additional enhancements in many other areas, such as security, TCP/IP autonomic tuning, and support for CICS transaction tracking. For more information, consider downloading the “z/OS V2R2 Communications Server Technical Update” presentation from the Winter 2015 SHARE Conference.