Introduction to IT Virtualisation
IT Virtualisation refers to the developing a virtual version of systems rather than actual which includes operating system, server, storage devices, network systems, etc. With the help of virtualisation, companies can run number of operating systems or other applications on the same server. It leads to increase the agility, flexibility and scalability in the field of IT along with cost saving. Firms can manage their workload with the help of faster and quality performance of the systems. The present study is based on the give case scenario. It includes commercial impact and potential of virtualisation, designing for virtualisation deployments, Along with this, file involves implementation and management of the virtualisation.
1.1 Commercial impact and potential of virtual infrastructure
As per the given case, company A is using one application to one server infrastructure. It results to increase the electrical charges due to the high consumption of the resources. It has employed 10 servers for performing its tasks. The commercial impact of the virtual infrastructure are positive which are described below...
Implementation of the virtual infrastructure at the place of present infrastructure in the company will reduce the cost of hardware and upgrading cost of the software or applications. It will also help in increasing the platform for many servers so that, company can work properly and can handle its issue of high electrical charges. Along with this, it will save the cost by reducing the need of hardware servers and related resources. After proper implementation of IT virtualisation, it helps in minimizing the cost regarding the administration and management of the manual.
This will give an opportunity to increase use of the latest techniques which will result to better functioning and performance. Company will start using cloud computing which will help in sharing work among the team members. It will result to organise time, resources and cost effectively. On the other hand, virtual infrastructure will provide to improve network connections among the various servers and will increase the use of virtual drives for storing the information. This will help the company A in increasing its market position and reputation among the clients. It will include hypervisor, a Virtual machine host, virtual drivers such as free virtual drive software, a para-virtualised network adapter and physical networking which includes bridged, internal, host only networking, etc.
The virtual infrastructure will provide its services in the form of centralisation which will help in managing each and every work properly and effectively. Along with it, testing of required resources will also take place for proper allocation and utilisation of them in the company environment. The overall centralisation of the infrastructure will result to improve the performance and working of the enterprise. It will also help in effective utilisation of the resources by running number of servers on a single virtual host. It will help the company A in better management and maintenance of their resources.
This will provide an opportunity to reduce the number of redundancies with the help of appropriate strategies such as mirroring, server image backup, load balancing, etc. With the help of server image backup in virtual machine, company can create a copy of operating system and all the information regarding to it. It will help in collecting all the information in a single pass. On the other hand, load balancing will help the company in distributing its internet traffic across the various servers. It will help in rising the performance of the servers and their optimum utilisation.
It refers to the ability of the computer applications to continuously perform and function well regardless of the change in size or volume for meeting the user's requirement. Virtualisation is highly scalable and provides business an opportunity to develop additional resources as per the requirement of many applications. For example, Company A can easily add extra server with the virtual host without any investment on time or money. Along with this, it will help the firm in creating new servers quickly and easily as there is no need to buy new hardware every time.
Identification of company A's need
Company A need for implementing the virtual server in its working environment is as follows...
Corporate Requirement: It is requirement of the user to virtualise the servers for better performance and proper utilisation of the resources. In present situation, company A is facing various issues with respect to the servers, their cost, maintenance and electrical charges. By implementing virtual servers, firm will able to maintain its servers and it will also reduce the cost of various hardware, As there will be one virtual host so it will also reduce the electrical charges.
For better storage of the information, it is requirement of the company to implement virtualisation in its working environment. It will help the firm in better storing of the files and other related important information in effective manner. Company needs proper safety and security while storing information into its servers which can be provided by the virtual servers.
Company A needs to response ass the requirement of the clients and ity is possible with the help of virtualisation. It gives guaranteed uptime to the servers and aplications which results to recover the damage in very fast speed.
Proper protection and security
It is important for the companies to keep their confidential information safe and secure. Company A wants to keep its all the information safe by protecting applications. With the help of server virtualisation, company can keep a copy of applications and information without purchasing any hardware.
Designing of new virtual infrastructure
For designing new virtual infrastructure, company needs 1 vitual server with more than 50 virtual machines. Company can select any of the server from the these virtualisation softwares Vmare, Microsoft's Hyper- V, Critx XenServer, etc. Company will able to run its virtual servers on 4 to 6 CPUs. On the other hand for storage, company A can use SATA drivers in a RAID 5 or RAID 6 array. This will also help in the improving the performance.
Design for solution
Process for designing the solution for the virtual infrastructure is as follows...
Assessing the current environment
In this, company needs to assess its environment for implementing two virtual servers. While implementing visualization infrastructure, company will need to convert its physical servers intop the virtual machines and for this it will need to understand the performance characteristic of its servers, software and other applications. Along with this, company A needs use its performance monitoring tools for identifying peak utilisation of the CPU, memory, network and disk resources on those two servers firm wants to virtualise.
Planning virtual environment
In this, company needs to choose the virtual platform for hosting its virtual machines. Company can take Vmware and Vsphere as both of these have rich features and provides solid performance metrics with broad guest OS support.
Hardware for Virtualisation
It is very difficult task to design the requirement of hardware as per the virtual infrastructure. In this company A needs to identify the specifications of the hardware for the chosen virtual servers. It needs to determine it on the basis of compatibility, storage availability, memory allocation, processor capability, network bandwidth, etc. For example Hardware Requirement for Server Virtualisation are as follows...
- 16 GB RAM
- 4 TB hard disk space
- OS in ESXI,
- 2*3 Gh dual core processors
- Vsphere desktop application
In this, company A will identify the feasibility of the selected solution as per its work and requirements. It will determine the answers of some questions like Does the selected solution provide the needed functionality? Is a server solution better than the desktop?, etc.
Deployment image requirement
In this company will identify the required memory for the efficient work and operations, software for installing applications, updating them, etc, selection of the operating system, etc. All these factors will be designed by the organisation.
At last, company needs to analyse its environment for making interaction between the various factors such as network addressing, access to the local and remote storage, etc.
Implementation of Virtualisation Deployment
As per the given case, company A needs to create two virtual machines and network these together. There need to have correct memory, CPU and storage resources. One server selected by the company is VM Server whose specifications are as follows.
One virtual processor on a host with one or more logical processors. Along with it, a multiprocessor host with the two CPUs
- Intel 440BX-based motherboard
- NS338 SIO
- 82093AA IOAPIC
- Memory: 3.6GB
- Graphics: VGA and SVGA suuport
- Floppy Drive: two 1.44MB floppy devices
- Serial Ports: 4 serial ports and output serial ports.
- Ethernet based protocols such as TCP/IP, Microsoft networking, Samba, Novell Netware, etc.
- It supports 9 or more virtual Ethernet switches.
Another server decided by the Company A is Microsoft's Hyper server whose requirement are as follows.
- Processor: x86-64 processor with hardware assisted virtualisation support.
- Memory: 2 GB (minimum) and 4 TB (maximum)
Guest operating system
- Hyper-V in windows server 2008 and 2008 R2 with up to 4 processors each.
- Hyper-V supports both 32 bit and 64 bit guest Vms.
- The implementation of the virtualisation deployment is as follows.
Build virtual environment
In this phase, company needs to install is servers and load its selected virtualisation hypervisor. It will also load the centralised management platform for effective use of services and resources. At the end, virtual hosts will be connected to the management platform.
Configuration of virtual environment
In this, company A needs to configure its both the servers with their static Internet Protocol (IP) addressees. In addition to it, firm needs to configure its network setting and VLAN as per the requirement of the virtual servers.
Secure the virtual environment
In this step, company A will set some hard and complex passwords on the virtual infrastructure by developing new VM's and installing clean operating systems (OS). Firm also need to perform a P2V conversion with the help of VMARE's converter enterprise.
Monitoring of virtual environment
In this phase, company will monitor the functioning of the new virtual host by using tools such as free version of ESXi Server and Vsphere Client. With the change in time, firm can changes its tool for monitoring the performance of its virtual infrastructure.
Maintenance of virtual environment
Company needs to maintain its virtual environment time to time. If company is using software of the Vmare or Vsphere then it can maintain the updates with the help of Update manager. With this manager, company can able to keep all its patches on the ESX servers easily.
Management of virtualisation environment
For performance testing company A needs to follow the following points.
Measurement of business performance
During the machine is under load, company needs to measure the response time of both the servers. In addition to the monitoring of the application for availability and throughput. While measuring both the factors, it is important that systems are stable and responsive.
Measurement of capacity/Hardware utilisation
When virtual environment is operating under full load, company should make ensure that both the physical and virtual host are utilised within the accepted and planned level (Maity and Dass, 2014). In addition to this, it needs to evaluate the key server stress point which includes CPU configuration, server IO throughput and memory utilisation for optimal performance of the virtual infrastructure.
Measurement of the change in scalability from the physical to virtual hosts. In this, company needs to identify the key failure points in both the applications and virtual servers for evaluating the performance.
Company A uses two virtual servers Vmware and Microsoft's Hyper V for the implementation of virtualisation infrastructure. After implementation of these machines and performance testing, their critical review regarding the performance is as follows.
As per my point of view the Vmware ESXi hypervisor is the best host and provides various features for the virtualisation. Along with it, the performance of this server is much better as compare to the Microsoft's Hyper V. On the other hand, Microsoft's Hyper V is able to distribute traffic properly which results to manage the work effectively and to access the internet without any disturbance. In contrast to it, scalability of the Vmware is more as compare to the Hyper V. Vmware provides imp-roved and effective scalability. It can support 64 hosts in a cluster and can accommodate 8000 virtual machines whereas Hyper V can host up to 1024 Virtual machines only.
With reference to the security, both the server provides central management security. In Vmware, it is possible to manage the passwords centrally whereas Hyper V manages the security and passwords with the help of active directory. On the other hand, Hyper V is effective for the large organisations as it provides unlimited host to host replications of the virtual machines whereas Vmware is for small shops and organisations by creating HA clusters of three hosts.
From the above analysis, it is concluded that IT virtualisation plays important role in the development and growth of the IT companies. It helps in managing and maintaining the work properly and effectively From the given case, Company A gets various benefits by implementing virtualisation infrastructure within its working environment. These advantages are related to the cost, support, technology, etc. On the other hand, performance of the company also depends upon the type of virtual server it selects.
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