DATA CENTER VIRTUALIZATION

Server virtualization refers to the servers and data storage devices that are simulated using software. It is the division or segregation of servers. Every single virtual server runs on its own and as a part of another physical server. Many virtual servers can run on a single physical server. These virtual servers can be isolated and can be handled singly, even away from the physical servers.

At a business and enterprise level, virtualization of data centers helps in reducing equipment costs, improves quality and system availability.

All the resources need to be managed well like the software and hardware in order to create virtualization efficiently and in an affordable manner.

In the traditional and conventional methods, every new application required a separate server. This inturn adds overhead costs and takes several weeks to be employed. This means that there are huge stacks of servers staged in different rooms. This would lead to excess power consumption and energy wastage.

Virtualisation is a technique of creating a virtual pool of servers, operating systems, storage devices and network resources. It enables a single user to access multiple physical devices at the same time. With this, one operating system can control the operation of multiple computers or vice versa.

Through virtualization, you can install a software only once and be rest assured that everyone will have access to it. You don’t need multiple licences to make the software available to all your employees. Since you are technically installing it only on one system, you are not violating any laws either. Same is true with storage. This technique avoids the need for data replication, thus saving storage space.

The drawback with data centers is the challenge you will face while scaling up as and when the need arises. Your data center host must have rack space to accommodate an extra server or two and also must be equipped to handle an increase in cooling and power needs. Of course, there is a problem of your resources going on standby mode when not in use, too.

Storage virtualization is one type of virtualization that greatly helps in reducing the operational costs and improving the agility of performance. It means that the large number of servers and storage devices are virtually stacked up in a pool, for e.g. a virtual storage pool. Storage virtualization leads to the next generation of data centers.

Computing virtualization is also growing very fast. Some of the leading companies in the space have developed cross-platform virtualization software that allows data center managers to cluster and partition servers. .With the help of these tools, many virtual servers can be offered on an a single server or a single server can offer the roles of many different virtual servers.

Networking virtualization can occur at the LAN or the WAN. On the LAN, virtual LAN technology allows network managers to isolate and partition LANs running on a single physical LAN.

On the WAN side, the same effect can be achieved with MPLS, a technology that offers partitioning of WANs into multiple isolated virtual WANs running on a single physical infrastructure. Virtualization can bring higher utilization, better security and easier management.

Server utilization can definitely bring in some great amount of flexibility and energy efficiency into data centers.

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Is Virtualization the Same as Cloud?

It is very common to confuse cloud computing with virtualization. Since they are both relatively new and since organizations are calling it the saving face of new age technology, I assumed we might want to look into what exactly the two technologies are and how diverse they are from each other.

Cloud is essentially a highly scalable platform where you can store data, build and run applications that can be accessed through the internet only. Cloud is a mode to mobilize all applications so that you can remotely access your organization data through any device that has access to internet. Data center hosts or collocation hosts who are interested in cloud technology provide software as a service packages to their clients. Cloud makes it possible to have your servers in a secure environment in any part of the world and your clients still can access and modify the data if they have required security clearance. Cloud makes use of virtualized resources in order to fulfill its requirements. A cloud host provides hardware and hosting facilities depending on the usage requested by the client.

Virtualization, on the other hand, is a technique of creating a virtual pool of servers, operating systems, storage devices and network resources. It enables a single user to access multiple physical devices at the same time. With this, one operating system can control the operation of multiple computers or vice versa.

Building your own data center takes a lot of capital investment; and maintaining it is a nightmare you do not want to go through if your main aim is to focus on your business. Hiring a service is a better option. Unlike the cloud, in a data center, you have to note that you will merely be storing your servers on someone else’s property. So you are responsible for upgrading your servers as and when technology takes a giant leap. The drawback with data centers is the challenge you will face while scaling up as and when the need arises. Your data center host must have rack space to accommodate an extra server or two and also must be equipped to handle an increase in cooling and power needs. Of course, there is a problem of your resources going on standby mode when not in use, too. Cloud may be an ideal solution from an economic point of view. Like we have mentioned before, you only pay for the services you are using; not for idle or standby services.

Virtualization is all about the control. Pure, unparalleled control over multiple devices using a single point of operation. With virtualization, for instance, you can run a very large application even though your system individually cannot support it. In other words, your system interacts with the other systems connected to the virtualization network, notes which system is available and uses part of the available system’s resources in addition to your own to run your application. It’s like your system has temporarily expanded its capacity to run your application successfully.

Through virtualization, you can install a software only once and be rest assured that everyone will have access to it. You don’t need multiple licences to make the software available to all your employees. Since you are technically installing it only on one system, you are not violating any laws either. Same is true with storage. This technique avoids the need for data replication, thus saving storage space.

So you see, one technology has nothing to do with the other; and they, most certainly, are not the same thing. Virtualization, to an extent, makes the cloud operable.

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Risks of Virtualization

Whether business are small or large are progressively spinning to virtualization technology in order to save cost and boost redundancies in case they face collapse. So the conventional security explanations are not enough to guard virtual machinery.

The capability to generate dozens of virtual servers as files in a sole corporal server might engrave electricity expenditure, save room, make IT management jobs more easier, and allows them to create split environments to test new appliances at their own will. No doubt that this is frequently used and highest mounting technologies in small and large businesses. But every thing that has its advantages must have drawbacks also and virtualization has no omission. Security issues are the main thing you have to be anxious more about that when you employ virtual servers. Most common risks of virtualization are:

Information safety is not originally involved in the Virtualization Plans
Information gathers from different sources indicates that almost 40 % of projects that uses virtualization technology were carry out without the use of information security group in the early planning and design stages. Normally, the operational expert team will dispute that nothing has changed in reality — by now they have skills and procedures to secure the workloads, operating systems and the hardware beneath. Whereas the truth is that this argument pays no attention to the original layer of software in the shape of a Hyper Visor (HV) and Virtual Machine Monitor (VMM) which is pioneered when workloads are being virtualized.

The cooperation of the virtualization levels might result in the cooperation of all hosted workloads

The virtualization level symbolize one more significant IT stand in the communications, and similar to any software that is write by humans, this level will certainly hold entrenched and exposed vulnerabilities that can be utilizable. Known to the advantaged level the hyper visor hold in the heap, hackers already have start target this level to potentially cooperate all workloads hosted over it.

The short of visibility and power on internal virtual nets shaped for VM to VM Communications Blinds Existing Security Policy Enforcement Mechanisms

For the purpose of efficiency in connections between the virtual machine,  nearly all virtualization policies contains the aptitude to produce virtual networks based on software and switch within the physical host to facilitate virtual machines to communicate straightforwardly. This interchange will not be noticeable to safety defense devices that are network based, such as network based interruption avoidance systems.

Workloads of diverse conviction stages are merged on to a particular physical server with no enough separation

As the organizations shift ahead of the low hanging fruit of workloads to be virtualized, additional vital systems and receptive workloads are being under attack for virtualization. This is not essentially a subject of matter but it can turn into an issue as these workloads are shared by other workloads from dissimilar trust regions on the similar physical server with no sufficient separation.

Sufficient controls on managerial admittance to the Hyper visor and VMM layer and to managerial apparatus are deficient

Because of the serious support the hyper visor/VMM layer supplies managerial admittance to this layer have to be firmly controlled, but it is complex by the verity that main virtualization policies provide several conduits of management for this layer.

A potential failure of separation of responsibilities for network and safety controls

As physical servers are misshapen into a single mechanism, it raise the danger that system managers and consumers will unintentionally get access to information that surpasses their usual freedom levels.

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Data Center Virtualization

A data center is a centralized storage area for physical or virtual data. The main use of data centers is storage and they should remain online constantly to accommodate the needs of users. A data center can be classified into 4 tiers and each one has its own significant requirements. Since IT companies are growing dynamically, they need their own virtualized data centers. What is virtualization and what is the need for virtualizing a data center?

Data Center Virtualizatin Technology

Virtualization is a technology which drives the application and servers to work in an uncommitted manner, interacting with the user’s needs to do the job in hand. It can bring a flexible data center, consolidation and standardization to a company. The key objective for an organization to run successfully is for the business to run trouble-free round the clock. For that, you need to have multiple data centers set up, each provided with the virtual applications and data. Not all data needs to be virtual, only the data which is critical for the organization. What are the benefits to be obtained by virtualizing a data center? It saves you cost for infrastructure and a simplified management process. Virtualization is done for each server so that if you need a server to stop acting or functioning, you can simply take it out and it doesn’t affect the other functioning servers. The maintenance and management of a virtualized data center is very significant for an organization.

Data Center Virtualization, Data Center Virtualization Solution

Data center security Overview, Security and Virtualization in the Data Center

Data Center Virtualization Scenarios

There are two virtualization scenarios which need to be followed in managing the physical and virtual infrastructure. They are:

  • Server Consolidation
  • Business Continuity

Server Consolidation reduces the costs of hardware components, space, power and management. Business Continuity makes the servers available to run 24/7 and maximizes the system run time.

You can centralize the management for better security reasons rather than giving security to each and every server. To make things simple, data centers need to be given virtualization. You can define the security policies based on the people who are requesting access and what is allowed to access the applications. Virtualization also provides security to stop hackers from accessing the applications. The essential factors that you need to maintain data centers are humidity, air pressure and temperature which are to be maintained according to the product specifications. The data center rooms must be monitored by someone, so that any decrease or changes in those factors can be returned to normal or else it could cause great damage. Routing a data center is also essential in order to avoid incorrect neighbor peering. The data center routing design is shown in the second diagram. To prevent incorrect routing, several measures need to be taken. These measures are Route peer authentication, Route filtering and Log neighbor changes.

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Security service traffic flow, Security and Virtualization in the Data Center

The virtualization can be done both in storage and block storage.  Storage virtualization preserves different physical storages as a single virtual storage, whereas the Block storage virtualization blocks or forms a gateway for the network attached storage systems in order to protect the storage information. Certain organizations use redundancy sites so that they can resolve user’s requests at any time, but they fail when their organization grows and is in need of a secondary site. If people want to access your network from all over the world, at any time and from any location, then the sites might go down which automatically leads you to a low performance stage. This is where virtualization comes into action. The virtualization is integrated with access technologies like SSN and VPN so that the users will be directed to the best site. This gives them full access control over the applications and networks without any interruption. Virtualizing data centers thus satisfies a need in your company’s growth.

IT Resources Consideration

When the Virtualization of IT resources are considered, one has to take into consideration the overall critical stages of the network topology. What’s your existing atmosphere? Do you have numerous data centers? Do you have provision for various ISP links from other providers? Are there programs that are needed for virtualizing? What kind of devices are they coming from to get to the applications? Is there a need to accelerate and secure the sessions across that variety of application scenarios? What are the goals, SLAs and objectives for the business? All these criteria have to be considered before setting up the virtualization. Making it possible for one to virtualize the data centers will really take your company standards to a different level. If an IT company has reduced the number of servers working without making any proper adjustments to the cooling devices then the effectiveness of data centers will go down resulting in a company failing.

Spreading the load, that is, splitting the servers as a rack lessens the consumption of power and no new power or cooling systems will be needed. Spreading the load has disadvantages too, such as an increase in cabling costs. Higher density racks will require a lot of cables and you need to check whether the floor can withstand these weights. Perhaps a supplement to the number of cooling systems will be necessary for these devices so that they are maintained to the temperature specified in the product. The cooling systems can be air conditioners or fans which yield the necessary cooling conditions.

Virtualizatin Effects on Data Center

Virtualization may decrease the overall power consumption for the organization if it is maintained properly. As the virtualization effect in data centers is unique, care should be taken with the power supplies and cooling systems to the components. Virtualizing data centers also gives you the benefit of booting a virtual machine from a powered off state. Thus by virtualizing a data center it can support more applications and maintain higher standards. A few years ago, companies had virtualization in their infrastructure rather than in data centers, but now data centers have been virtualized for better organization with a fewer number of servers and thus reducing the cost of expenses in all ways. Virtualizing data centers is neither complicated nor costly, and it reduces both your expenses and the space taken up by servers.

 

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