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  • 1. Linux on IBM System z [ zLinux ] Two great operating systems, even better together
  • 2. Agenda  Introduction  10 Years of zLinux  System z and Linux : The winning Combination  Virtualization  Server Consolidation  Benefits Snapshot  Linux Distributions  Open Source Software on zLinux  Out of the Box Applications  Questions 2
  • 3. Introduction Linux running on IBM System z machines The only difference between zLinux and other platform versions of Linux are portions of the compilers, runtime libraries, and a hardware- dependent component of the Linux kernel. Linux on System z originated as two separate efforts (Bigfoot (i370) and Linux for S/390) to port Linux to IBMs largest servers. Linux on zSeries is completely open source under the GNU General Public License. Although the recommended approach is to run Linux under z/VM, Linux can run in an IBM System z logical partition (LPAR) without virtualization. Linux on System z can execute on either a Central Processor (CP) or an Integrated Facility for Linux (IFL). The major benefit of an IFL is that it has no impact on IBM software pricing for z/OS. 3
  • 4. 10 Years Ago.. Increased solutions through Linux application portfolio Large number of highly skilled programmers familiar with Linux Integrated business solutions • Data richness from IBM zSeries • Web capability of Linux applications Industrial strength environment • Flexibility and openness of Linux • Qualities of service of zSeries Unique ability to easily consolidate large number of servers 4
  • 5. 10 Years of zLinux More applications Cloud Computing The number of Cloud ComputingLinux on S/390 Major available applications and BI are only aProject started Announcements approaches 1,000, with few workloads as an effort to IBM to Spend $1B over 300 ISVs that are best fit to port Linux for First Release Hipersockets developing. Consolidation Enterprise Linux S/390 Linux 2.2.13 IBM announces on System z SuSe ELS 7 More Software machines kernel for project “Big Green” System/390 250 applications to shrinks 3,900 released ported to Linux on servers to about 30 System z zLinux servers 1999 2000 2001 2003 2006 2009 2010 5
  • 6. SLES – SuSe Linux Enterprise Server RHEL - Redhat Enterprise Linux 6
  • 7. Mainframe - Practice HighlightsVirtualizationA Virtual Machine simulates the existence of a dedicated real machine, includingprocessor functions, storage, and input/output resources. 7
  • 8. Mainframe - Practice HighlightsVirtualizationThe heart of the VM architecture is a control program or hypervisor called VM-CP. It runson the physical hardware, and creates the virtual machine environment.  System z provides logical (LPAR) and software (z/VM) partitioning  z/VM is a hypervisor(VMM), which refers to a system that virtualizes the real hardware environment  PR/SM enables highly scalable virtual server hosting for LPAR and z/VM  IRD coordinates allocation of CPU and I/O resources among LPARs 8
  • 9. Mainframe - Practice Highlights The Power and Flexibility of System z Virtualization  Over 40 years of continuous innovation in virtualization technologies  Multiple images concurrently share all physical resources  Resources delivered as required, automatically, based on need  New OS images can be started without affecting on-going work 9
  • 10. Mainframe - Practice Highlights  Every component in the box operate in full isolation for security and recoverability.  Components are integrated through memory-to-memory speed hipersockets (In-memory TCP/IP network) reducing intrusion points to minimum. 10
  • 11. Server Consolidation on zLinux Consolidate more servers and spend less on software Manage more server images with fewer people, up to 50% improvement in staff productivity Save up to 80% on energy and floor space Deploy new servers and applications faster Absorb workload spikes and maintain service level agreements with less complexity 11
  • 12. Server Consolidation on zLinux  Discrete servers consume incremental expense  Reduce costs without sacrificing server  Hardware price and maintenance autonomy (one server per application)  Floor space, power, cooling  Virtual, high-speed, inter-server connectivity  Additional support staff  Exploit an architecture designed for high  Per server (engine) software fees availability  Mainframe qualities of service  Connectivity requires kilometers of cables  Proven disaster recovery services  High availability ensured by spares / re-boots  Connect to discrete servers as required  Disaster recovery rarely successfully tested 12
  • 13. Rapid Horizontal Growth Dedicated processors and disks  Shared resources Complex system management  Simplified system management New servers available in days  New servers online in minutes 13
  • 14. Integrated Facility for Linux (IFL) There are many ways to run Linux on a mainframe. An IBM mainframe processor dedicated to running the Linux operating system, with or  As a job under z/OS, the Linux without z/VM. workload benefits from the IBM introduced IFLs on September 29, 2000 direct management by z/OS. expressly designed to reduce software costs. (OMVS is an example) An IFL is not required to run Linux — Linux runs  Linux as a single operating on general purpose processors (CPs) as well. system on a System z IFLs simply cost less. logical partition (LPAR) Will not support traditional mainframe operating systems. Only Linux and z/VM Version 4 will run  Running under the z/VM on IFL engines operating system with z’s Only usable in LPAR mode and cannot be Central Processors. "mixed" with standard processors  Running under the z/VM operating system with z’s IFL special-purpose Linux Engines. IFL engine has a one-time fee, which is approximately $40K 14
  • 15. System z and Linux : The winning Combination Combine workloads from heterogeneous  Linux on MSAT Mainframe low-to-mid range servers into zLinux  12 Linux images on z/VM images using virtualization  Various DBCLOB on different software Leverage Open Source software on Images zLinux to host internet/intranetCLOB  One Image with Open Source Software Stack applications and reduce the software  IFL Engines to reduce operating cost significantly cost BLOB Utilize zLinux environment for training and development and reduce maintenance cost of other servers Consolidate WebSphere and Java applications on zLinux to achieve higher system utilization Improve server management with Tivoli monitoring and automated provisioning on zLinux to reduce operating costs 15
  • 16. Benefits SnapshotThe Linux on System z infrastructure provides significant IT cost savingsopportunities: People Cost – increase the productivity of the IT staff Software Costs – reduce software license fees by consolidating a large number of virtual machines per System z core Energy Costs – dramatic reduction in power usage Facilities Costs – reduce floor space with dense server consolidation on System z Networking Costs – consolidate networks inside the box 16
  • 17. Linux Distributions 17
  • 18. Linux Distributions 18

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