VIRTUAL INFRASTRUCTURE

VMware® Infrastructure is the industry’s first full infrastructure virtualization suite that allows enterprises and small businesses alike to transform, manage and optimize their IT systems infrastructure through virtualization. VMware Infrastructure delivers comprehensive virtualization, management, resource optimization, application availability and operational automation capabilities in an integrated offering.

Global Computer Systems offers virtualization services that can dramatically improve the efficiency and availability of applications and resources for your organization. This approach to IT infrastructure helps increase the efficiency, utilization, and flexibility of existing assets while cutting costs. We help our clients achieve this by enabling them to run multiple virtual machines on a single physical machine, sharing resources across multiple environments and as an enterprise VMware partner Global Computer systems can offer our wealth of knowledge to our clients.

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What is Virtualization and What are Virtual Machines?
Virtualization is an abstraction layer that decouples the physical hardware from the operating system to deliver greater IT resource utilization and flexibility. Virtualization allows multiple virtual machines, with heterogeneous operating systems (e.g., Windows 2003 Server and Linux) and applications to run in isolation, side-by-side on the same physical machine. A virtual machine is the representation of a physical machine by software. It has its own set of virtual hardware (e.g., RAM, CPU, NIC, hard disks, etc.) upon which an operating system and applications are loaded. The operating system sees a consistent, normalized set of hardware regardless of the actual physical hardware components. VMware virtual machines contain advanced hardware features such as 64-bit computing and virtual symmetric multiprocessing

 With a VMware Infrastructure, IT departments can build a virtual data center using their existing industry
 standard technology and hardware. There is no need to purchase specialized hardware.

 In addition, VMware Infrastructure allows users to create a virtual data center that is centrally managed
 by management servers and can be controlled through a wide selection of interfaces.

 You can see in the diagram to the right that you would not need to purchase as much hardware

              Virtual Data Center Architecture
             
              VMware Infrastructure virtualizes the entire IT infrastructure including servers, storage
              and networks. It aggregates these heterogeneous resources and presents a simple and
              uniform set of elements in the virtual environment.
               

             With VMware Infrastructure, I.T. resources can be managed like a shared utility
              and dynamically provisioned to different business units and projects without
              worrying about the underlying hardware differences and limitations.


Virtual Data Center Architecture
As shown 

VMware Infrastructure presents a simple set of virtual elements used to build a
virtual data center:

• Computing and memory resources called Hosts, Clusters
   and Resource Pools
• Storage resources called Datastores
• Networking resources called Networks   
• Virtual machines

A Host is the virtual representation of the computing and memory resources of a physical machine running ESX Server. When one or more physical machines are grouped together to work and be managed as a whole, the aggregate computing and memory resources form a Cluster. Machines can be dynamically added or removed from a Cluster. Computing and memory resources from Hosts and Clusters can be finely partitioned into a hierarchy of Resource Pools.

 


Datastores
are virtual representations of combinations of underlying physical storage resources in the data center. These physical storage resources can come from the local SCSI disks of the server, the Fiber Channel SAN disk arrays, the iSCSI SAN disk arrays, or Network Attached Storage (NAS) arrays.


Networks
in the virtual environment connect virtual machines to each other or to the physical network outside of the virtual data center.

 


Virtual machines
are designated to a particular Host, Cluster or Resource Pool and a Datastore when they are created. A virtual machine consumes resources like a physical appliance consumes electricity. While in powered-off, suspended, or idle state, it consumes no resources. Once powered-on, it consumes resources dynamically, using more as the workload increases or give back resources dynamically as the workload decreases.

VMware VMotion virtual machines run on and consume resources from individual physical x86 servers through VMware ESX Server. VMotion enables the migration of running virtual machines from one physical server to another without service interruption as shown in Figure below. This allows virtual machines to move from a heavily loaded server to a lightly loaded one. The effect is a more efficient assignment of resources. Hence, with VMotion, resources can be dynamically reallocated to virtual machines across physical servers. 

                     see image below

VMware DRS Taking the VMotion capability one step further by adding an intelligent scheduler, VMware DRS enables the system administrator to set resource assignment policies that reflect business needs and let VMware DRS do the calculation and automatically handle the detailed physical resource assignments. VMware DRS dynamically monitors the workload of the running virtual machines and the resource utilization of the physical servers within a Cluster.

                           see image below

VMware HA offers a simple and low cost high availability alternative to application clustering.
It enables quick restart of virtual machines on a different physical server within a Cluster automatically should the hosting server fail. All applications within the virtual machines will benefit from high availability, not just one as with application clustering. VMware HA works by placing an agent on each physical server to maintain a “heartbeat”with the other servers in the Cluster. As shown in Figure 1-8, loss of a “heartbeat”from one server automatically initiates the restarting of all affected virtual machines on other servers.
                         see image below

Networking Architecture VMware Infrastructure is the only solution that provides a rich set of virtual networking elements that makes networking the virtual machines in the data center as easy and simple as in the physical environment. Furthermore, it enables a new set of capabilities not possible in the physical environment because many of the limitations in the physical world don’t apply.

Storage Architecture The VMware Infrastructure enables enterprise-class storage performance, functionality and availability without adding complexity to the user applications and guest operating systems.

Of all the virtualization solutions in the market, only VMware Infrastructure is architected from the ground up to enable customers to bring the benefits of virtualization to the entire enterprise platform, including server, storage and networking systems. VMware Infrastructure not only enables customers to build an entire virtual data center that matches the capabilities available in the physical world, but it goes one step further by offering the flexibility and control that is physically cost-prohibitive or impossible. With a whole suite of complementary virtualization and management services such as virtual VMware VMotion, VMware DRS, VMware HA and VMware Consolidated Backup, VMware Infrastructure is the only offering that delivers a complete solution rather than piece-meal approach for customers to build a data center in a virtual environment. In its third generation since being the first-ever to virtualize the x86 platform, VMware Infrastructure has developed a large third-party solutions ecosystem and enjoys industry-wide hardware and software certification support. Since inception in 1998, it has been production tested and deployed in some of most demanding and largest IT production environments.
VMware Infrastructure is the only virtualization solution ready for enterprise-wide deployment by corporate IT or for your small business.

                                                                  Call Global Computer Systems now for an in-depth conversation about your Infrastructure

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