SAIGONTECH COPPERATIVE EDUCATION NETWORKING Spring 2009 Seminar #1 VIRTUALIZATION EVERYWHERE

VIRTUALIZATION What Is Virtualization? Why Virtualization? How Does Virtualization Work? Applications Conclusion

What Is Virtualization? Originally part of IBM mainframe technology (January 1967). One x86 computer runs on a single. operating system (OS) and a application. Run multiple guest OS and multiple applications at the same time on a single physical host server. Multiple Virtual Machines (VM's).

Why Virtualization? Server Consolidation Move multiple servers onto a single physical host with performance and fault isolation provided at the virtual machine boundaries. Hardware Independence Allow legacy applications and operating systems to exploit new hardware. Multiple OS configurations Run multiple operating systems (Windows, Linux) simultaneously, for development or testing purposes.

Why Virtualization? (Cont.)‏ Cluster Computing Management at VM granularity provides more flexibility than separately managing each physical host. Increase server utilization (from 15 to 80%). Save time, money & energy while achieving more with the computer hardware they already own. Reduce Total Cost Ownership (TCO).‏

How Does Virtualization Work? 3 popular Virtualization softwares: * Vmware * Citrix XenServer‏ * Microsoft Virtual Server 2005 R2

VMware Full virtulization. Use software such as VMware ESX Server, transforms (virtualize) hardware into software. CPU, RAM, hard disk & network controller - to create a fully functional virtual machine. Multiple virtual machines share hardware resources without interfering with each other. Insert software layer into hardware & host OS to create VM monitor (Hypervision).

Vmware (Cont.)‏ VMware ESX Server Full Virtualization

Vmware (Cont.)‏ Virtualization on a single computer VMware Server Virtualization across hundred of computer & storage devices to transform your IT infrastructure into an automated, always-on computer "utility plant". VMware ESX Windows 2003 (host) ----> VM1 (Linux), VM2 (Sun Solaris), VM3 (Novell Netware)...

Xen Server * Open Source Xen - Linux * Open Source Hypervisor – software layer inserted between the server hardware & OS * Decoupling the operating system and its applications from the underlying physical server * Run Applications on Any Server. * Multiple virtual servers can simultaneously share a single physical server.

Xen Server Paravirtualization

Xen Server Xen Paravirtualization Technology Fastest & most secure virtualization software. Near-native performance. Guest OS must be modified to use Hypercall. Guest OS limit to open sourse such as Linux. The virtual servers and hypervisor co-operate to achieve very high performance for I/O and for CPU and memory virtualization. Leverages Hardware Virtualization.

Xen Server Paravirtualization

Xen Server Xen Full Virtualization (hardware support): CPU Intel® VT CPU AMD-V™ Run native (unmodified OS) to run with Xen virtual machine. Xen host operates in root mode and has access to the real hardware. Unmodified guest operates of non-root mode and its "hardware" accesses are under complete control of the Hypervisor.

Xen Server The first guest operating system, called in Xen terminology "domain 0" (dom0)‏ The second guest operating systems, called "domain U" (domU) in Xen terminology. Modified versions of Linux, NetBSD and Solaris (Unix-like) can be used as the dom0. Unmodified versions of Microsoft Windows and other proprietary operating systems can also be used as guests if the CPU suppo rts VT technology.

Xen Server Xen virtual network topology Each domain network interface is connected to a virtual network interface in dom0. Eth0--->Vif1.0 (interface #0 in domain 1).‏ Eth0--->Vif2.1 (interface #1in domain 2)‏. Network-Bridge, network-NAT. Vif-brige, vif-NAT.

Microsoft Virtual Server 2005 R2 Full Virtualization. Consolidate infrastructure, application, and branch office server workloads. Consolidate and re-host legacy applications Automate and consolidate software test and development environments. Simplify disaster and recovery planning.

Applications Virtulization for server consolidation and contaiment. Virtual SAN (Storage Area Network), iSCSI. Business continuity High Availability (HA) and Disaster Recovery (DR)‏ Capacity Management. Management — the real value of virtualization.

Conclusion Virtualization enables the consolidation of data center resources and eliminates physical server sprawl. Native virtualization improves efficiency deliver higher performance at lower cost. Virtualization assistance, now available in new hardware processors from Intel® VT and AMD- V™. Lastly, advances in virtual infrastructure management tools will improve the manageability.

Conclusion (Cont.)‏ manageability of virtual environments and reduce operational costs related to maintaining them. ECONOMIC OF VIRTUALIZATION

End of Document Thank you for your attention! Questions?