Virtualization and how it leads to cloud
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The document provides an overview of virtualization, including its definition, types, and the role it plays in cloud computing. It discusses the benefits of virtualization from both business and technological perspectives, such as cost reduction and improved resource allocation. Additionally, it compares various virtualization technologies and hypervisors, highlighting trends in the market and future growth in client desktop virtualization.
Virtualization and how it leads to cloud
- 1. Virtualization and how it leads to cloud... - Huzefa Husain - https://in.linkedin.com/in/huzefaaa - huzefaaa@gmail.com
- 2. Overview âą What exactly is virtualization? âą Types of virtualization âą Current trend in virtualization âą How virtualization leads to Cloud Computing? âą Cloud Computing Stack 2
- 3. What exactly is virtualization? âą Inserting a layer of software between the machine and traditional operating systems. âą Creating multiple logical server OS instances on one physical piece of hardware âą All HW drivers are virtualized. âą Each virtual machine is completely independent of the others and doesn't 'realizeâ itâs virtualized. 3
- 4. Types of Virtualization Hosted Virtualization 4 Bare-metal Virtualization
- 5. What is a Hypervisor? âą A hypervisor, also called a virtual machine manager (VMM), is a program that allows multiple operating systems to share a single hardware host. 5
- 6. It's all about Rings âą x86 CPUs provide a range of protection levels also known as rings in which code can execute. Ring 0 has the highest level privilege and is where the operating system kernel normally runs. Code executing in Ring 0 is said to be running in system space, kernel mode or supervisor mode. All other code such as applications running on the operating system operate in less privileged rings, typically Ring 3. 6
- 7. Rings in virtualization Traditional systems âą Operating system runs in privileged mode in Ring 0 and owns the hardware âą Applications run in Ring 3 with less privileges Virtualized systems âą VMM runs in privileged mode in Ring 0 âą Guest OS inside VMs are fooled into thinking they are running in Ring 0, privileged instructions are trapped and emulated by the VMM âą Newer CPUs (AMD-V/Intel-VT) use a new privilege level called Ring -1 for the VMM to reside allowing for better performance as the VMM no longer needs to fool the Guest OS that it is running in Ring 0. 7
- 8. Example â Server Consolidation 8 3 â server scenario Consolidated server scenario
- 9. Example â Server Consolidation 9
- 10. Example â Server Consolidation 10
- 11. The benefits of Going Virtual (ThebusinessperspectiveâŠ..) âą Simplify data center â to create more dynamic and flexible IT Infrastructure âą Reliability and Availability - Build up business continuity through improved disaster recovery solutions and deliver high availability throughout the datacenter. âą Reduce capital expenses through server consolidation âą Improve operating expenses through automation. 11
- 12. The benefits of Going Virtual (ThetechnologyperspectiveâŠ..) âą Efficiency: use the native hardware of the physical machine to as great a degree as possible (without affecting application Performance) âą Flexible Resource Allocation: Hot add vCPUs and memory, VMFS volume grow, hot extend virtual disks, hot add virtual disks, hot add NICs. âą Advanced Memory Management: Ability to reclaim unused memory, de-duplicate memory pages, compress memory pages âą Less administrative overhead: Single management interface to control hosts and VMs 12
- 13. Marketplace Offerings Freely Available âą OpenVZ (Open Source) âą KVM âą VMWare Server (GSX) âą Xen 3.0 (Open Source) Commercial âą Virtuozzo âą VMWare ESX âą Xen Enterprise âą Microsoft Virtual Server âą Virtual Iron âą RedHat Virtualization
- 14. Virtualization options (Citrix Xen or Vmware ESXi) âą Xen and ESXi are two cost efficient mature technologies in market and are âenterprise readyâ. 14 Citrix Xen: The virtualization technique is called integrated virtualization or paravirtualization. VMware ESXi: The virtualization technique is called full virtualization.
- 15. âą Two main directions in virtualization: â Full virtualization (ESXi): the VMM provides an identical abstraction of the underlying hardware âą No changes required to the guest Oss â Paravirtualization (Xen): the VMM provides an âalmostâ identical abstraction of the underlying hardware. The abstraction implements some new instructions to make the machine virtualizable. âą Guest OSs need to be modified. 15
- 16. Feature Comparison (Vmware ESXi Vs Citrix Xen) 16 Hypervisor Attributes VMware vSphere Hypervisor 5.0 Citrix XenServer 5.6 FP1 Small Disk Footprint Small disk footprint >1GB OS Independence No reliance on general purpose operating system Relies on Linux in Dom0 management Partition Hardened Drivers Optimized with hardware vendors Generic Linux Drivers Advanced Memory Management Ability to reclaim unused memory, de-duplicate memory pages, compress memory pages Only uses balloning. No ability to de- duplicate or compress pages. Does not adjust memory allocation based on VM usage. Advanced Storage Management VMware vStorage VMFS,Storage vMotion, Storage DRS Lacks an integrated cluster file system, no live storage migration, storage features support very few arrays High I/O Scalability Direct driver model I/O bottleneck in Dom0 management OS Host Resource Management Network traffic shaping, per-VM resource shares, set quality of service priorities for storage and network I/O Lacks similar capabilities
- 17. Feature Comparison (Vmware ESXi Vs Citrix Xen) 17 Hypervisor Attributes VMware vSphere Hypervisor 5.0 Citrix XenServer 5.6 FP1 Performance Enhancements AMD RVI, Intel EPT large memory pages, universal 32-way vSMP, VMI paravirtualization, VMDirectPath I/O, PV guest SCSI driver No large memory pages, no paravirt guest SCSI device, Requires inflexible SR-IOV Virtual Security Technology VMware VMsafeâą Enables hypervisor level security introspection Nothing comparable Flexible Resource Allocation Hot add VM vCPUs and memory, VMFS volume grow, hot extend virtual disks, hot add virtual disks Nothing comparable Custom image creation and management VMware Image Builder allows administrators to create custom ESXi images for different types of deployment, such as ISO- based installation, PXE-based installation, and Auto Deploy. Nothing comparable Auto Deploy vSphere Auto Deploy enables faster provisioning of multiple hosts. New hosts are auto provisioned based on rules defined by user. Nothing comparable Management Interface Firewall ESXi Firewall is a service-oriented and stateless firewall that protects the ESXi 5.0 management interface. Configured using the vSphere Client or at the command line with esxcli interfaces. Nothing comparable Enhanced Virtual Hardware 32-way virtual SMP, 1TB virtual machine RAM, Non hardware accelerated 3D graphics, USB 3.0 device support, Unified Extended Firmware Interface (UEFI). 8-way virtual SMP only, 32 GB RAM per virtual machine
- 18. VMWare Failover technology 18 VMWare HA Minimize Downtime from Server and Operating System Failures Data Center 1 Data Center 2 Fault Tolerance (Active â Shadow) Local Survivability Enterprise Survivability Storage Storage
- 19. Current market trend in virtualizationâŠ. (Source: Gartner) 19
- 21. Market Share 21
- 22. Client desktop virtualization âą According to Gartner: - Professional clients using HVD will grow from approximately 368,000 in 2008 to 70 million in 2014. - Professional users will migrate away from the traditional PC delivery model, driving HVD growth. - By 2014, 10% of professional client install base will consist of thin clients and diskless / repurposed PCs, from 3% in 2008. 22
- 25. 25 Virtualization leads to Cloud Computing
- 26. 26 Cloud Computing Stack Compute Compute App Framework Compute App Framework Business Logic âąAmazon âąGoGrid âąLinode âąRackspace âąOthers⊠âąAppEngine âąAzure âąEngineYard âąForce.com âąHeroku âąGoogle Apps âąSalesforce âąTaleo, Workday, âąMany others
- 27. 27 Thank You