![]() ![]() Servers ‘serve’ client computers with information/data that users or other servers request. When you introduce a dedicated server (such as a Microsoft Windows Server or Linux Server) to a network setup, computers on the network communicate directly with the server instead of the other computers on the network. This article will help you make an informed decision, as well as providing a detailed comparison between Windows Server 2019 and earlier versions. Hardware independence also means that you can run a heterogeneous mixture of operating systems and applications on a single physical computer.If you're looking to host a server, there are different factors to consider, should you be looking at a physical server or a virtual machine, what about on-premise or on the cloud like Azure. When coupled with the properties of encapsulation and compatibility, hardware independence gives you the freedom to move a virtual machine from one type of x86 computer to another without making any changes to the device drivers, operating system, or applications. Virtual machines on the same physical server can even run different kinds of operating systems (Windows, Linux, etc). For example, you can configure a virtual machine with virtual components (eg, CPU, network card, SCSI controller) that are completely different from the physical components that are present on the underlying hardware. Virtual machines are completely independent from their underlying physical hardware. For example, you can move and copy a virtual machine from one location to another just like any other software file, or save a virtual machine on any standard data storage medium, from a pocket-sized USB flash memory card to an enterprise storage area networks (SANs). Encapsulation makes virtual machines incredibly portable and easy to manage. Isolation is an important reason why the availability and security of applications running in a virtual environment is far superior to applications running in a traditional, non-virtualized system.Ī virtual machine is essentially a software container that bundles or “encapsulates” a complete set of virtual hardware resources, as well as an operating system and all its applications, inside a software package. If, for example, there are four virtual machines on a single physical server and one of the virtual machines crashes, the other three virtual machines remain available. While virtual machines can share the physical resources of a single computer, they remain completely isolated from each other as if they were separate physical machines. As a result, virtual machines are completely compatible with all standard x86 operating systems, applications and device drivers, so you can use a virtual machine to run all the same software that you would run on a physical x86 computer. Just like a physical computer, a virtual machine hosts its own guest operating system and applications, and has all the components found in a physical computer (motherboard, VGA card, network card controller, etc). The Tier-4 facilty situated in the London Docklands ensures the equipment is in a safe and secure operating environment. It is based in the Global Switch London 2 datacentre. ![]() Our enterprise-class infrastructure is provided by our parent company, EX Networks. We use Dell M620 blade servers backed by a fully redundant Cisco network and an EqualLogic SAN storage system. Our Virtual Machine infrastructure is based on the VMWare vSphere cloud operating system which allows us to spread customer virtual machines over several physical servers meaning any physical host failure would be completely transparent and the virtual machine would still be up and running. As a result, virtual machines offer a number of distinct advantages over physical hardware. Nevertheless, a virtual machine is composed entirely of software and contains no hardware components whatsoever. Even the virtual machine thinks it is a “real” computer. A virtual machine behaves exactly like a physical computer and contains it own virtual (ie, software-based) CPU, RAM hard disk and network interface card (NIC).Īn operating system can’t tell the difference between a virtual machine and a physical machine, nor can applications or other computers on a network. A virtual machine is a tightly isolated software container that can run its own operating systems and applications as if it were a physical computer.
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