Linux Distribution Partners

SUSE LINUX

Product Information at suse.de/en/produkte/susesoft/S390/

Turbolinux

Product Information at turbolinux.com/products/s390

Red Hat Linux

Product Information at redhat.com/software/S390

z/VM Version 4 and Version 5

z/VM supports Linux on the mainframe. Within the VM environment, Linux images benefi t from the ability to share hardware and software resources and use internal high-speed communications. While benefi ting from the reliability, availability and serviceability of IBM ^ zSeries servers, both z/VM V4 and V5 offer an ideal plat- form for consolidating Linux workloads on a single physi- cal server which allows you to run tens to hundreds of Linux images. z/VM V4 is priced on a per-engine basis (one-time charge) and supports IBM Integrated Facility for Linux (IFL) processor features for Linux based workloads, as well as standard engines for all other zSeries and S/390 workloads. Engine-based Value Unit pricing for z/VM V5.1 is replacing the pricing model available with z/VM V4. Engine-based Value Unit pricing is designed to provide a lower entry point and a decreasing price curve which will help provide improved price/performance as hardware capacities and workload grow. Value Unit pricing helps you to add capacity and workload with an incremental and improved price and the ability to aggregate licenses acquired across machines that are part of your enterprise.

Integrated Facility for Linux (IFL)

The Integrated Facility for Linux feature of the zSeries serv- ers provides a way to add processing capacity, exclusively for Linux workloads, with minimal effect on the model des- ignation. Operating systems like z/OS, TPF, and VSE/ESA will not execute on Integrated Facility for Linux engines. Consequently, these engines will not necessarily affect the software charges for workload running on the other engines in the system.

OSA-Express Ethernet for Linux

Driver support is provided for the functions of the new OSA-Express Gigabit Ethernet and 1000BASE-T Ethernet features.

OSA-Express Enhancements for Linux

A new function, Checksum Offl oad, offered for the new OSA-Express GbE and 1000BASE-T Ethernet features, is available for the Linux on zSeries and z/OS environ- ments. Checksum Offl oad provides the capability of calculating the Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Internet Protocol (IP) header checksums. Checksum verifi es the correctness of

les. By moving the checksum calculations to a Gigabit or 1000BASE-T Ethernet feature, host CPU cycles are reduced and performance is improved. When checksum is offl oaded, the OSA-Express feature performs the check- sum calculations for Internet Protocol Version 4 (IPv4) packets.

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IBM z/OS manual Linux Distribution Partners, VM Version 4 and Version, Integrated Facility for Linux IFL