How it can help your organisation

Transcription

1 How it can help your organisation

2 History Types of Virtualisation & Hypervisors Virtualisation Features Why Virtualisation? Virtualising Oracle Performance Licensing Support Cloud

3 1998 VMware founded by Diane Greene, Dr. Mendel Rosenblum and Ed Bugnion 1999 Workstation 1.0 released for Windows & Linux 2000 Workstation 2.0 released 2001 ESX 1.0 (Elastic Sky X) & GSX 1.0 (Ground Storm X) released Workstation 3.0 released

4 2004 1st VMworld conference in San Diego, CA (1,400 attendees) ESX 2.5 released GSX Server 3.0 released VMTN technical communities launched EMC Acquires VMware nd VMworld conference (3,500 attendees) Player 1.0 released P2V Assistant 2.0 released Workstation 5.0 & 5.5 released

5 rd VMworld conference (6,700 attendees) VI3 released with ESX 3.0 & VirtualCenter 2.0 Server 1.0 released (replaced GSX Server) th VMworld conference (10,800 attendees) ESX 3i released Fusion 1.0 for Mac released ESX 3.5 & VirtualCenter 2.5 released Workstation 6.0 released

6 th VMworld conference (14,000 attendees) Fusion 2.0 released VMware Server 2.0 released Workstation 6.5 released ESXi becomes available for free Paul Maritz takes over as CEO from Diane Greene 2009 vsphere ESX 4 released

7 Server Virtualisation Desktop Virtualisation Presentation Virtualisation Application Virtualisation

8 What is a hypervisor? A hypervisor, also called a virtual machine manager (VMM), is a program that allows multiple operating systems to share a single hardware host. Each operating system appears to have the host's processor, memory, and other resources all to itself.

9 Type 1 Hypervisor (Bare Metal) Runs directly on a given hardware platform controlling the operating system environment. Eg: VMware's ESX Server, Hyper- V and Xen. Type 2 hypervisor (Hosted) Runs inside an operating system environment. Eg: VMware Server, Microsoft Virtual Server and PC Virtualisation products like VMware Fusion, Parallels for Mac and Virtual PC. Client hypervisor (New)

10 1. Traditional Hosted Virtualisation 3. Bare-metal Virtualisation 2. 3.

11 Overhead of a full general-purpose operating system between the virtual machines and the physical hardware results in performance % of native

12 ESX install right on the bare metal and therefore offers higher performance but runs on a narrower range of hardware. Used for server consolidation for Data Centers High performance and scalability Many advanced features for resource management, high availability and security Centralized administration with vcenter Server Supports more VMs per physical CPU then hosted products do. The hypervisor or VMM is referred to as the VMKernel in ESX & ESXi

13 Because there is no overhead from a full host operating system performance is 83-98% of native. There is a small bit of overhead from the Virtualisation layer of the VMKernel.

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15 VMFS is VMware's unique clustering file system which allows for multiple hosts to read and write from the same storage location concurrently. It has adaptive block sizing and uses both large block sizes favored by virtual disk I/O and sub-block allocation for small files and directories. Uses on-disk disk file locking to ensure that the same virtual machine is not powered on by multiple servers at the same time.

16 The virtual SMP (vsmp) feature allows you to assign more than one virtual CPU to a virtual machine. Up to 8 virtual CPUs can be assigned to any virtual machines.

17 VMotion allows you to quickly move an entire running virtual machine from one host to another without any downtime or interruption to the virtual machine This is also known as a hot or live migration.

18 1. Migration request is made to move the virtual machine from ESX1 to ESX2. 2. vcenter Server verifies that the virtual machine is in a stable state on ESX1 and checks the compatibility of ESX2 (CPU, networking, etc.) to ensure that it matches that of ESX1. 3. The virtual machine is registered on ESX2. 4. The virtual machine state information (including memory, registers and network connections) is copied to ESX2. Additional changes are copied to a memory bitmap on ESX1. 5. The virtual machine is quiesced on ESX1 and the memory bitmap is copied to ESX2. 6. The virtual machine is started on ESX2 and all requests for the virtual machine are now directed to ESX2. 7. A final copy of the virtual machines memory is done from ESX1 to ESX2. 8. The virtual machine is un-registered from ESX1. 9. The virtual machine resumes operation on ESX2.

19 Storage VMotion allows you to migrate a running virtual machine and its disk files from one datastore to another on the same ESX host The difference between VMotion and Storage VMotion is that VMotion simply moves a virtual machine from one ESX host to another but keeps the storage location of the VM the same, Storage VMotion on the other hand changes the storage location of the virtual machine while it is running and moves it to another datastore on the same ESX host

20 1. New virtual machine directory is created on the target datastore, virtual machine configuration files and all non-virtual disk files are copied to the target directory. 2. ESX host does a self VMotion to the target directory. 3. A snapshot (without memory) is taken of the virtual machines disks in the source directory. 4. Virtual machine disk files are copied to the target directory. 5. Snapshot that is located in the source directory is consolidated into the virtual machine disk files located in the target directory. 6. Source disk files and directory are deleted.

21 Continuously monitors all hosts in a cluster and restarts virtual machines affected by a host failure on other hosts Can also monitor guest OS's for a failure via a heartbeat and restart them on the same host in case of a failure

22 DRS enables your virtual environment to automatically balance itself across your host servers in an effort to eliminate resource contention. Distributed Power Management (DPM) (experimental) can consolidate workloads and power off hosts during periods of low activity. When activity increases DPM brings hosts back online so service levels can be met.

23 Update Manager Consolidated Backup Fault Tolerance

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25 So what exactly is a virtual machine? A virtual machine is defined as a representation of a physical machine by software that has its own set of virtual hardware upon which an operating system and applications can be loaded.

26 Virtual machines provide: Hardware independence VM sees the same hardware regardless of the host hardware Isolation VM s operating system is isolated from the host operating system Encapsulation Entire VM encapsulated into a single file

27 A virtual machine is comprised of a number of files that are located in it's home directory.

28 Low utilization metrics in servers across the organization

29 Too many servers for too little work Aging hardware reaching end of usable life High infrastructure requirements Limited flexibility in shared environments

30 High costs and infrastructure needs Maintenance Leases Networking Floor space Cooling Power Disaster Recovery

31 Reduced costs through server consolidation that uses fewer servers Higher availability through automatic restart of critical servers Better load balancing No downtime for maintenance through the use of VMotion to evacuate servers when fixes are required Portability Easier planning and implementation of disaster recovery

32 One-to-One phase is over Nothing technical that stop people from deploying Oracle RISK/SPARC/SOLARIS - Big VMware customers moving to x86 platform and happy with results Technology has changed (Intel Nehalem & VT) Best Practices & tunning was critical, not the case anymore 2 10% overhead with a fully loaded database in vsphere Treat virtual instance as you would treat physical database.

33 98% of the content contained in Oracle optimisation and tuning books directly transfer over to the virtual world Oracle on VMware Expert tips for database virtualisation (by Bert Scalzo)

34 Virtualizing Performance-Critical Database Applications in VMware vsphere

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36 Very Confusing? Biggest Issue? Oracle x86: you license the entire box per user (not many people use it) New servers with 32 cores would have to be fully licensed Oracle sub-license cores in the Sparc/Solaris space

37 Oracle will do best effort support on virtualized environments Since Jan 13, 2010, Oracle supports SAP production landscapes on Oracle DB single instance (no RAC) virtualized with VMware ESX 3.5 and higher. No support for Oracle RAC

38 Virtual Machines on-demand Encapsulation and on-demand deployment of multiple VMs as a single entity Encapsulation and on-demand deployment of whole software stacks (e.g. LAMP, Ruby on Rails,.NET, etc.) Encapsulation and on-demand deployment of entire multi-tiered apps Cloud-to-Cloud VMotion & svmotion

39 Blog: