1. Linux on Mainframes A Case Study

2. What is Linux • Open Source Operating system distributed under terms of GPL. • Developed by Linus Torvalds and maintained by a worldwide community of developers. • Available in different distributions with use ranging from desktop users to high end applications.

3. Why Linux ? • Open source and hence offers high flexibility • Supports different architectures like Intel, Alpha, Sparc. • Ships with bundles of tools and utilities. • No cost of ownership involved. • Better Performance as compared to other operating Systems • Supported by World Wide network of developers

4. IBM S/390 Offering • Provides features like Heavy Multi-way processors, channelized I/O, High RAS • Implements Symmetric Multiprocessing (SMP) for faster data processing • Provides large memory, logical partitions, large volume DASDs • Strong and rugged architecture ideal for high-end business needs • Added support for TCP/IP to connect to Ethernet or token ring network, which was earlier missing • Support for Parallel Sysplex environment and also supports IEEE Floating point

5. Why Linux on S/390 ? • Reliability: IBM S/390 is the most reliable hardware platform available • Flexibility: Linux is the most flexible and easy configurable operating system available • Stability: Combining the best software and best hardware provide the most stable system • Security: IBM mainframe is the most secure system in the world

6. Why Linux on S/390 ? • High Load Capacity: Owing to its gigantic hardware and its excellent management in Linux, such a system has very high load capacities • Virtualization: Several instances of Linux can be run on this system eliminating the need to buy separate PC servers • Faster Processing: Linux can make best use of the rich features like SPM, channelized Input Output, thereby ensuring faster processing speeds

7. Change in Customer’s Perspective • Customers need not replace mainframes to shift to the web technologies. Mainframes now provide TCP/IP access thereby leveraging on the earlier investment instead of buying new PCs • Linux can exploit the mainframe’s strength and high capacity hardware to deliver better and reliable processing • Enables consolidating the number of separately running PC servers to virtual servers on mainframe • Linux on S/390 is supported by wide number of applications • Centrally managed and deployable system

8. Change in Customer’s Perspective • Results in saving of administrative costs, software costs, electricity costs and floor space by consolidation • Economical deployment of basic Internet Services • Provides robust, secured and centralized System • Large number of talent pool available to support the fusion of these two technologies • Customer can adapt to the new age technologies using a reliable, robust, secure system which is also scalable for future needs at a low Total Cost of Ownership

9. Supporting Partners • IBM has formed the Linux Community Development System (LCDS) and is providing the developers with Linux account on their OS/390 systems to encourage the development and support • IBM is offering free support in the form of redbooks and download of Linux to run on S/390 systems • Suse, Redhat, Turbo Linux, Debian are some of the Linux Distributors providing Linux support on S/390 • Major ISV (Independent Software vendors) are providing support for applications for Linux on S/390 e.g. SAP, sendmail • A large community of developers worldwide comprising discussion forums and technical websites is providing support to Linux on S/390

10. Supporting Partners (contd..) • Mainframe Linux solutions mature with mySAP.com for IBM eServer zSeries • E-Mail Inventor Ports Software to IBM Linux Mainframes • Websphere, E-commerce suite supports Linux on Mainframes • SuSE Ships Linux for IBM Mainframe

11. Changing Trends: Success Stories • Banco Mercantil Moves to Linux on IBM Mainframe • Deutsche Telekom AG chooses Linux on an IBM zSeries mainframe for high availability • Böllhoff selects Linux and mainframes for its IT strategy • Winnebago Industries Hits the 'Open' Road with Linux on the IBM Mainframe • Boscov deploys E-business solutions using Linux on IBM Mainframe • Korean Airlines flies with linux on IBM Mainframe • Tamkang University excels at data storage with IBM and Linux solution. • IBM Linux mainframe chosen by European telecom • Taiwan Securities Firm Selects Acucorp for Linux in IBM S/390 Server Migration

12. Changing Trends: Success Stories • University of Florida: Linux Mainframe to Form Core of "Virtual Grid" Research Lab • Many more case studies of companies shifting to Linux on IBM Mainframe

13. Triggers to the IT service providers • The demand for Web services based solutions is fast increasing • Linux on mainframes provides these web based solutions to the clients on their existing mainframes • This model also proves out to be cost efficient to the customers • IT service providers serve a number of clients using IBM mainframes. • These companies can leverage more business from these mainframe customers by building expertise in Linux on Mainframes

14. Links to Linux for S/390 web sites • http://oss.software.ibm.com/developerworks/opensource/linux390 • http://itsopok.itso.ibm.com/internsh.nsf/IntNumber /LS-J003 • http://vm.marist.edu/linuxvm/ • http://penguinvm.princeton.edu/ • http://linux.s390.org/ • http://linux390.marist.edu/ • http://www.marist.edu/htbin/wlvlists/ • http://www.linuxplanet.com/linuxplanet/reports /1532/1/ • http://www.vm.ibm.com/linux/

15. Thank You