Virtualisation is an important step towards improving overall IT efficiency. IT managers must cope with shrinking IT budgets and growing client demands. They must simultaneously improve asset utilisation, use IT resources more efficiently, ensure business continuity and become more agile. In addition, they are faced with ever-mounting constraints on power, cooling and space.
Servnet helps customers achieve consolidation and virtualisation within their existing environments in order to optimise their IT investments; our virtualisation experts are available to design and implement your consolidation and virtualisation solution. Building a virtualised environment requires the implementation of several key technologies from multiple vendors. Servnet has partnered with world class vendors and has carefully selected a range of products and services to support effective virtualisation strategies. Our aim is to make virtualisation as easy as possible to understand, design and deploy.
Server virtualisation dramatically reduces the number of physical servers in an organisation by enabling multiple 'virtual servers' to be run on a single or reduced number of shared machines. Each virtual server has its own operating system, applications will run as normal, and users have access via the network as usual. Multiple virtual servers are managed via a single management layer, or 'hypervisor'.
With storage virtualisation, storage capacity is removed from the individual user or server and is instead deployed in single or shared pools. Storage capacity is allocated to and accessed by the user or server via the network and can be adjusted to meet actual demand at any time. Proactively managed by the IT team, disk space can be fully utilised without wastage. Capacity planning, data classification by importance, backup and restore and peak-time balancing all become easier.
Application virtualisation dramatically reduces the number of physical servers and desktop PCs in an organisation by enabling multiple applications to be run on a single machine, or a reduced number of servers, contained within a dedicated server farm. Applications share system resources such as operating system, memory and processing power, with workloads balanced to ensure optimum performance.
Virtual Desktop Infrastructure (VDI) consolidates large estates of desktop PCs onto a centralised server farm where every user has their own 'virtual' PC. Instead of users having an expensive, dedicated, fully loaded PC on their desk, they all access a full version of the operating system (Windows, Linux...) environment, including desktop applications, located remotely on the server. They do this from much lower cost 'thin client' PCs or terminals.
Through network virtualisation, a dedicated 'acceleration appliance' is deployed at each end of a network connection. This increases data transfer speed and the capacity of the connection without the expense of adding extra telecommunications bandwidth. Network acceleration underpins wider virtualisation strategies and enhances remote backup and disaster recovery performance, while improving large file transfers and the overall user experience.
Converged Fabric and I/O Virtualisation
Input/output (I/O) virtualisation is a methodology that simplifies management, lowers costs and improves the performance of servers in enterprise environments. I/O virtualisation environments are created by abstracting the upper layer protocols from the physical connections. The technology enables one physical adapter card to appear as multiple virtual network interface cards (vNICs) and virtual host bus adapters (vHBAs). Virtual NICs and HBAs function as conventional NICs and HBAs, and are designed to be compatible with existing operating systems, Hypervisors and applications. They appear as normal cards to networking resources (LANs and SANs). In the physical view, virtual I/O replaces a server's multiple I/O cables with a single cable that provides a shared transport for all network and storage connections. That cable (or commonly two cables for redundancy) connects to an external device, which then provides connections to the data centre networks.