Objectives of any business can be achieved through excellent customer service and different types of services are provided by following Cloud Service Models:

1. SaaS (Software as a Service):

A software release model, SAAS is hosted centrally in the cloud along with its allied data and can be accessible through users by means of web a browser. SaaS is also referred as “on-demand software”. For many business applications such as, accounting, collaboration, customer relationship management, business enterprise resource planning, human resource management, content management and service desk management etc, SaaS becomes a general delivery model.

Usually the term SaaS can be precisely used where most of the initial application service providers focus on managing and hosting third-party independent software vendors who are capable enough to build up and run individual software. Also by means of currently used software architecture, cloud computing service providers make a separate instance of an application mandatory for each business, so, to design an application in view of providing multiple businesses and users with corresponding partitioning of data, a multi-tenant architecture as a service solution has been utilized by existing web-based software.

2. PaaS (Platform as a Service):

Using a Cloud service model called as PAAS, applications can be used effortlessly, exclusive of any complication regarding the cost and management of the required hardware and software. As PaaS supports the complete life cycle of building and delivering web applications and services by facilitating design, development, testing, deployment and hosting itself.
Services like team collaboration, web service integration and marshalling, database integration, security, scalability, storage, persistence, state management, facilitation of developer community, application versioning and instrumentation, etc. might be provisioned as an integrated solution over the web.

All these facilities permit customization of the existing SaaS applications which is comparable to the facility of packaged software applications such as Microsoft Word. But, every time developers and users of PaaS need to subscribe SaaS applications, in view of developing a comprehensive environment, stand-alone PaaS environment has been proposed which is free from any type of technical, licensing or financial dependencies based on specific SaaS applications or web services. Still, some PaaS  applications require improvement in the development, debugging and testing capabilities to provide hosting-level services such as security and on-demand scalability etc.

In PaaS, under the concept of Open platform as a service, developers can use any programming language, database, operating system and server too.

3. IaaS (Infrastructure as a Service):

To release infrastructure as a fully outsourced service, IaaS is a capital investment-sourced model. As by means of IaaS, all the resources like servers, software licenses, data center space and network equipment etc can be purchased by clients as fully outsourced service only. Hence concerning the customer’s significant project, IaaS through a dedicated hosting environment is the most stout, safe and sound policy.

Advantages of IaaS:

1. Dynamic scaling: capability of scaling up and down the various resource aspects in close to real time, according to varying business requirements.

2. Usage-based pricing: This strategy of IAAS helps customers in purchasing the precise infrastructure which may be required at any particular time by ensuring “just pay for what you use”.

3. Reduced capital and personnel costs: Reduced in-house infrastructure considerably eliminates capital expenditures and enduring cost for workforce and enables any organization to concentrate on core competencies in view of developing and filtering market product offerings more willingly than purchasing hardware accessories.

4. Access to superior IT resources: Unaffordable Enterprise-grade IT infrastructure and engineering resources become accessible to IaaS users.

Cloud services are very serious alternative to traditional models of access to IT, and their popularity among companies is growing rapidly. The advantages of such services may be to reduce overall costs, increase scalability, quick to provide solutions and simplifying management. On the other hand, to entrust the key components of technology to another company, then loosen control over them and create a risk that must be managed. The experience of outsourcing has led to a recognized approach to contracting to mitigate risks and maximize the benefits of using external services. However, the provision of services via multiple access cloud platform includes some of the nuances in the negotiation and conclusion of agreements. Therefore, CIOs should consider the following points.

1. Make sure that the terms of the agreement are under negotiation

Although the agreement in terms of the agreement during the negotiations may seem self-evident, many cloud providers do not usually allow you to make changes in its version of the agreement, arguing that the special conditions for various clients undermine model for community access and positioning service providers in the market. This does not mean that companies should not use the services on standard terms. But it is necessary to realize the risks involved.

With flexible terms of service you need to make sure that they are more beneficial than any standard agreement or such that you can only express my agreement by clicking the mouse. And also the fact that an agreement cannot be changed unilaterally. If these conditions are not met, your company must retain the right to terminate the agreement with a significant deterioration in its terms, without bearing any responsibility.

2. Make sure that the price structure does not preclude advantages of cloud solutions

Cloud services offer the possibility of rapid scaling-making, better asset utilization and overall cost savings. But the agreement may impose restrictions on these benefits. For example, providers of SaaS limit the number of available jobs, providers of IaaS – the minimum duration of use of infrastructure. You should ensure that the agreement do not restrict the company’s ability to control costs under proposed models of the clouds. Negotiations on the use of software needs to be carried out in accordance with established practice, and you assume discounts depending on the amount or term of the contract, the differentiation of licenses in accordance with user roles and limitation of price changes in the future.

3. Develop a service level agreement with the light of experience

Service level agreement (SLA), as is the case with any IT service should reflect the full range of services. For example, because the cloud provider will be responsible for Internet connectivity and infrastructure, availability of services should not be determined by monitoring the server in data center. The agreement may specify a particular user interface and query performance, timeliness of the major package of tasks and response time / removal in case of failure.

The goal is to develop a limited set of metrics, which ensures that customer satisfaction is in complete constitute and not  a violation of SLA. For each metric should be removed with no clear exclusion criteria (eg, service interruptions caused by the need for urgent repairs, and the concept of “urgency” is not defined). Your company should pay attention not only to compensation for breach of SLA, but also a thorough analysis and eliminate its causes. Ultimately, your company must guard against downtime and have the right to break the agreement in the presence of chronic problems.

4. Consider the impact of collective platform for the company’s work

Your company must assess the impact of providing services through multiple access platform and proactively address potential problems in current operations. For example, the agreement with the provider should provide that your organization will receive a choice acceptable to its break in service for the technical work in advance and will be notified for all actions affecting the service.

Release Management procedures must comply with the company, which will be entitled to use the penultimate version of the software. It should be possible loss of functionality of the release (or a change of software packages as an optional feature) and to mitigate this by determining the minimum period of notice, the right to work indefinitely with the previous version and break the agreement without indemnity provider. Try to pre-assess the needs in the management of releases that may occur as a result of social integration, when agreeing prices for access to test environments. Otherwise, you risk on getting a big bill for reference.

5. Note the shift in the cloud computing and out of it

Deployment in the cloud and the expiration or termination of lease also requires careful attention. As for the transition to the cloud, then you must make sure that the actions of the provider are clearly defined, and agree SLA with installing and configuring applications, as well as the downloading of data. If you receive additional professional services to deploy, should ensure that by default, they were tied to key cloud services. When not to use the cloud provider should help in the organization of migration, including export data and schema in a consistent format. It should also consider the requirement to periodically archive data to mitigate the current or connected with the peculiarities of contract difficulties in the way of an orderly transfer. The best protection is a proven ability to easily switch to another provider at a different decision. CIOs should be aware that a lack of confidence in safe transition to another provider weakens the position of the company in negotiations and narrows the range of options available.

Public clouds become revolutionary innovation in IT which is not just for small and medium-sized businesses. At the moment, most companies are experimenting with public clouds as a resource for development and testing or for production applications with low requirements for security, protection of personal data and service levels. It is believed that large companies of public clouds may be of interest only in a specific niche, given their large investments in legacy systems and the critical role of such systems for their business. Nevertheless, a number of these companies see great potential in public clouds. They feel an urgent need to make a choice between pro-active work with the public and the clouds behind the competition.

We talked with many of the companies to begin with development of public cloud services providers. Naturally, the applications that these companies would like to move to public clouds being studied to determine their cost-effectiveness in this model. We propose a generalization read reviews over the ten kinds of hidden costs in the public cloud. We have split these costs into four broad categories:

• one-time cost of migration
• limitations of the model of billing
• residual costs of management
• risk premium

Single migration costs

Its costs are associated with moving existing applications to the traditional, physical infrastructure in the public cloud, including costs to modify the application and transfer of server systems, and associated with writing off the cost of equipment depreciation.

In this category there are two types of potential costs, for which you need to watch.

Rewriting applications. In a typical company, the most used applications are not yet ready for transfer to the cloud. Certain applications that already run on virtual machines or developed in accordance with the standards of the cloud platform, are well-tolerated. But most require significant processing or rewriting code to ensure compatibility. This is especially true for legacy applications. Organizations need to assess the economic feasibility of the transfer of such applications. It may be cheaper to keep them in original form or to completely abandon them in favor of new ones.

Promoting standards of cloud platform and justification of the need to update technology invariably are difficult for application developers. This should be taken into account when considering the use of public clouds.

Write-offs for depreciation. Companies that choose to update the application or infrastructure to accelerate the transition to the use of public cloud, could face the impossibility of further depreciation of existing equipment for depreciation. This explains why many companies intend to begin the study of clouds, when the time comes to change equipment.

Limitations of the billing model

The current model of billing in relation to a public cloud computing has three features that may not correspond to the nature of your enterprise applications.

Award for flexibility. One of the most lauded features of public cloud is the payment of actual consumption, which allows companies to handle peak loads. Because prices are set properly, it could mean an additional fee for applications that are constantly in the public cloud and are subject to bouts of activity. What is important is the right choice with regard to each application. Applications that use smooth or predictable demand, would be economically efficient in the use of models for providing computing power on demand.

The fee for crossing the cloud. The fee for incoming and outgoing data – an important factor that we must always remember, especially in case of heavily used applications. Anxiety also causes an additional delay that occurs in the cloud of server hosting when requests for the transfer of large amounts of data.

Storage costs. Virtual multiplayer server architecture complexity and costly storage, causing the need for optimization through storage virtualization, storage, fast devices only frequently used data and deduplication. Most companies are just beginning to familiarize themselves with the appropriate tools.
Residual management costs

It is important to remember that you will not be able to abandon old service, which will have to continue to provide within the company, even after the transfer of applications in a public cloud.

Attention is drawn to four areas of management

Security, in particular update the OS and antivirus management. Of course, there are the usual and enhanced security measures to be taken when working with the public cloud. There are basic costs associated with software licenses, upgrades and maintenance when installing patches and antivirus software. These costs are present regardless of whether the company chooses a public or private cloud or traditional uses its own physical infrastructure.

Back up

Most public clouds do not provide backup. This is one of the many reasons why businesses often do not even consider the possibility of using public clouds. A significant part of the companies need to continue to maintain all the internal infrastructure for backup and data recovery. This is another cost item that increases the cost of public services, the clouds over the face value.

The redistribution of the load and automatic scaling. These capabilities are required to handle requests to the system, the optimal use of resources and prevent overloads. They require specialized equipment and costly new software. These costs are often passed on to corporate customers, but not to the providers of cloud services.

Services for integration. They are necessary to ensure full compatibility with the client installed and deployed in the cloud systems. Organizations that tolerate application in public clouds must be purchased for this expensive software.

Reward for risk

Use of the public cloud enterprises primarily should always be prepared for worst-case scenario. You need to prepare for the costs of transfer services at its own site in case your provider of public cloud collapses, or you just do not want more use of its services. It is important to determine the extent of the costs of such migration.

Here we should pay attention to the plan out the clouds. Requires thought-out plan migration from public clouds back to their own equipment (which is highly unlikely) or in another cloud (more realistically). Drawing up such a plan requires additional time and effort, as well as extraordinary financing. The companies that have already endured the application of a private cloud in the public or had a case to learn the standards of tolerance, migration costs will be small. But most companies do not have such experience. Therefore, for the transition to a public cloud, they should provide funds for the organization of deliberate withdrawal.

According to the analysis for the market of “Software As a Service, SaaS“, it is grown by 20.7% in 2011 as if compared with 2010 and reach $ 12.1 billion, and it will continue until 2015 – first and then the sales will amount to 21.3 billion dollars, i.e. more than twice as many as in 2010.

Under the SaaS, it includes software, which are owned, managed and delivered remotely by one or more service providers. Consumers use the software by subscription or on contract and pay for services as consumption.

Analysts say that the popularity of this model to applications is growing. They explain this by saying that budget cuts forced businesses to look for cheaper ways to use the software, services, SaaS becomes more mature, and cloud computing technologies are attracting more interest. In connection with the development of SaaS services and the prevalence reduced initial concerns about security, response time and service availability. Vendors expanding network of partners to provide these services, increased industry specialization of services, strengthening community partners and consumers.

In the last couple of years some buzz around SaaS subsided and shifted towards cloud computing – a broader concept that also covers technology and SaaS, which is a layer of applications in the general stack architecture of clouds. However, the key indicator of the success of SaaS cloud computing concept is now about 75% of services and SaaS can be considered as cloud services, and by 2015 this figure will reach 90%, since the SaaS model will become more mature and fuse with the cloud solutions model.

The biggest market segment of SaaS is customer relationship management (CRM). According to forecasts, in 2011, its volume will reach $ 3.8 billion (in 2010 – $ 3.2 billion) and will be 32% of the market SaaS. According to analysts, with the development of services “CRM-on-demand” is expanding its distribution.

Revenue from the delivery of ERP SaaS model will reach $ 1.7 billion (in 2010 – $ 1.5 billion). In fact, the ERP market share in the SaaS model accounted for only 7%. With the SaaS model most commonly used means of human resource management and enterprise resource management and production approach, SaaS almost does not apply.

If you go into a cloud environment, above all, prepare a checklist for a successful transition into the clouds. Without a doubt, the cloud has became a hot topic all over the world because of the mobility and flexibility at lower cost. Cloud Infrastructure is the next-generation platforms that can provide tremendous value to any business. Many companies are now moving to the advanced and cost-effective concept of cloud hosting.

Successful migration to the cloud requires a sober assessment of all pros and cons. Here we try to touch up on some of the considerations in the transition to a cloud environment to help you to decide whether you need a transition into the clouds or not. Here are a few basic steps before moving to the cloud.

First, assess how much in demand and popular your website is, and what time is an acceptable downtime for you.

What level of control do you expect?

If you want to have total control and you want to use all the resources in the network, select the personal cloud.

What are the options you have access to?

Determine your need for access in advance.

What applications do you have now? It sounds too corny, but to go to the Web, make sure that these applications are Web-based applications. You can choose a few simple tools to convert them when necessary. If your application was originally designed for. NET / Java, you must understand before the migration and technological aspects of the compatibility options for these technologies in the cloud, where you plan to migrate.

Do you interact with other technologies?

Make sure that these technologies are also supported in the clouds, in which you want to migrate.

What type of database do you use in cloud computing?

It is important to make sure that the targeted cloud infrastructure support your database. If not supported, please check whether you can change the database or run an application in the cloud using its used in the database.

Flexibility and portability in cloud solutions: Check whether you can move between cloud providers. If you have access only to a specific provider, after the application is deployed, it can impose restrictions on your ability to migrate to another cloud platform.

Scalability: Able to indicate whether you provide dynamic scalability and redundancy of your application server. If your application is not able to scale dynamically, should not go into the clouds.

Security risks in the cloud, above all, evaluate the conditions of the provider and its reputation. After that, evaluate the security risks that can be detected when the client is accessible from any system connected to the network.

Upgrade costs: Check the different suppliers and packages that they offer, with detailed specifications. Weigh the costs and technical implications for updating your applications.

These are just some of the most important things you should consider before migrating into the cloudy environment. We hope that this will help you to choose the right kind of cloud hosting and help you achieve maximum benefit.

Cloud Hosting, also called clustering is a hosting service that operates a network of servers that are connected permanently. As a shared hosting is limited to the resources like disk space, bandwidth, memory, processing speed of a single machine, the cloud servers provide access to a virtually infinite infrastructure and do not necessarily need to be in the same data center, in reality it is likely that the servers are spread around the world.

The Cloud Hosting provides an environment that does not limit the request to a specific set of resources.

The Cloud Hosting allows servers hosting sites to have an agility and optimized performance. The servers use redundant networks and large Internet service providers with local and international broadband connection.

How it works

Features of Cloud Hosting is limited to hardware and application handlers. For example, resources may be limited to the amount of: RAM server, processing, energy storage and bandwidth. It can also be limited to the amount of available space, budget and a host of other reasons that hinder the expansion.

Cloud computing allows the customer to buy more computing power according to the need. Energy resources and load balancing are intended to provide seamless connectivity to the end user .

Benefits

With the opportunity to have more resources available, the end user is able to expand business without incurring extra inventory or overhead. For the first time, he’s getting something that is economically efficient, more reliable and better all around.

Companies of Cloud Hosting only charge the amount of computing power that is used by the user. Think of it as a bill similar to the supply of electricity or water – you pay for what you use. The Cloud Hosting provides the ability to meet sudden spikes in traffic without having to pay for extra bandwidth when traffic is slow. All billing is based on use.

The Cloud Hosting offers benefits of reduced costs through consolidation, more security , better performance and flexibility. There is also the benefit of redundancy. Users are now able to reduce its inventory of hardware, which leads to less energy requirements and, of course, benefits the environment.

The Cloud Hosting is a very attractive proposition for anyone involved in commerce of any kind and especially those with budget constraints. Small businesses and entrepreneurs, among others, are able to focus on growing the company without having to learn new skills or spend precious budget resources with additional personnel.

The Cloud Hosting is great for IT professionals who can pre-establish their bandwidth based on different levels of Internet traffic.

The days are gone when it was necessary to maintain contact with the host to request extra bandwidth or lose the habit, because the band was not available.

Ease of Use

What was once done by a large number of IT professionals, can now be accomplished by one person in a matter of minutes. Suppose, for example, we need a server to host our applications. It will now be able to launch a server with its own root password where the user can load its own code.

In many cases, there is no provision of a domain, blog WordPress and other applications.

In conclusion, the Cloud Hosting is stronger, more profitable and more reliable than the issue of self-hosting.

Cloud services typically implement common features and require an agreement about the quality of service (SLA). In such cases, the business model of the organization will face difficulties related to the management of cloud services. The cloud services management as a process of developing a system is aimed at using the power and possibilities of cloud computing to solve business problems. It is possible to use the experience of its own specialists, but there are other ways to effectively implement this approach in the organization.

With the spread of cloud services to enterprises, it raises a difficult problem to control their use and performance, as well as integration with internal resources. The result is a new area of activity – agent cloud services. By definition, an activity for cloud services management and their integration. These brokers may be the current VAR-value added resellers and system integrators. They will be responsible for compliance with SLA-agreements, and are most likely to specialize in certain industries. They are especially useful for small and medium-sized businesses that are poorly versed in the intricacies of the cloud services market and have difficulties when using them. Such brokers can take advantage of fast-growing cloud market and earn good money on services that they resell or integrate.

Office of the clouds will be the main activity of the cloud brokers. Indeed, cloud services providers are offering ready to use services, but generally do not consider the specific needs of your business and that these services need to be integrated into a single solution with other services that you supply. That enterprises can leverage cloud services, someone has to expand, integrate and customize. In most cases this is not required to make changes in the functional service, but simply to supplement or to aggregate them, while ensuring quality of service.

The basic idea of cloud computing is to allow companies to receive services in terms of outsourcing. If you want to create a completely new technology base and to train employees in the integration or expansion of these services (or their management), it will require large expenditures. Nevertheless, some companies are going to manage cloud services. Such an approach would be more exception than the rule, but if your company has chosen this path, you should make sure that it will solve business problems rather than complicate them. In addition, you must check the availability of a good reason to deploy the cloud infrastructure at the plant. Potential benefits must outweigh the costs and risks.

But most companies do not implement their own cloud, and appeal to a cloud broker. As there is a lot of demand for such services, it would increase costs for companies and the amount of related work.

Eventually this could lead to the fact that the company will be tied to a particular provider and a set of services, because investing in the expansion of services or integrate them, you will not like to lose this investment, changing services or providers.

Solution is to appeal to cloud brokers, who provide mediation service or aggregation of cloud services that enable your company to get what it wanted. With relevant qualification, they play a role similar to system integrators as well as provide managing cloud services to many customers. Over time, these system integrators will be VAR-Reseller of the services that are expanding. In this case, your company will not be tied to a single cloud provider, because you will not pay providers and brokers. If you want to change, you can change the broker, to appeal directly to the provider or ask your broker to provide other enhancements.

In the future, we would hardly expect a clear division between public and private clouds. Companies are likely to use different options, including hybrid models, virtual private clouds and the set of all possible combinations. As the distribution of cloud service providers should expect the possibility of setting the most popular services.

Just three years ago, one of my friend came in incredibly irritating mood, when he went through a new phase of technology development. “But what, really, is this cloud computing? – He said at the time – I have no idea what all are talking about. This is nonsense!”.

Sorry, Friend. Today, even you must admit that cloud computing does not only exist, but have become almost the main topic in the field of information technology.

Ultimately it is about to do the work of organizations more efficient and profitable.

Below are four recommendations for IT managers.

1. Decisions regarding the cloud services should be guided by the needs of business and not for technical reasons.

The benefits should be a key factor in determining the application of the cloud. Cloud is increasing pace of development of the organization, helping people work smarter and collaborate more effectively. But IT budgets are usually planned at least a year, which does not resolve issues as quickly as required by the cloud model.

How did I do? Include the cost of cloud computing in the monthly operating expenses. This will provide the flexibility to use all the Cloud tools necessary for new business initiatives.

2. Out the best in the cloud to your opponents endorsed the idea of additional expenses.

U.S. Department of Defense has demonstrated flexibility of this technology, when applied cloud in the aftermath of the earthquake in 2010 in Haiti. There has been no basic communications networks. The military used what they called a computing environment with fast access (Rapid Access Computing Environment, RACE), as a platform for exchange of information to serve the rescuers in this impoverished country. Rescuers have resorted to this tool for collaboration. They came out in social networks, looking for worldwide local translators with knowledge of Creole and consultants who helped them solve problems. In the traditional computing environment, this would require much more time. Of course, not all companies decide matters of life and death, as it was in Haiti. But they need a fast and qualified answers to their questions, which often depends on the success or failure of the event.

3. Good e governance services provides the necessary foresight. But should not replace the cloud.

Mobile employee who establishes a customer or another product, and has made presentations to them and perform other tasks on the spot, cannot wait until the IT department will find and acquire the necessary tools to them. In the era of Web 2.0 such employee can find everything he need, and buy cloud version. Of course, in this case there are problems in management and some tough questions. For example, how can we allow the provision of service, if you do not have a clue how many people will use them and how they access it? Or this: who can guarantee the safety and reliability of these instruments? But all this does not prevent the conclusion of contracts. IT managers should work with vendors, seeking to cloud resources were effectively deployed in the enterprise. Through policy management, user training is conducted, in which they can, say, to ensure their own safety. After all, IT architecture, in which all functions are carried out centrally from within the company, rooted in the past.

4. Be prepared to adjust its interpretation of “measured success”.

Ultimately, as a cloud services to be primarily a tool of business and only secondarily – a technical resource, you cannot fully express its value to quantify, as we did in traditional IT environments. Instead of analyzing, for example, statistics on its use, you will need to develop new indicators. Something like: “creating new business opportunities.”

It seems more or less accepted that SAAS is a part of cloud. There are numerous references throughout the web that is defending this position and even in a lot of posts on cloud can see the software as a service as part of cloud services.

But is it really SaaS Cloud ?

Recall that the differential factor of cloud is one that allows access to the resource / s hardware and software almost immediately and get rid of them in the same way. It is precisely this characteristic that distinguishes it from usual hosting and ASP .

High above, technically to be able to get the differential factor, the cloud relies on the multitenancy as hardware and software architecture for allocating the resource and the concept of scalability to meet increasing demand or decreasing the customer. And all this quickly.

From the customer point of view who is using a SAAS , is it an accessible resource away? That is, what is saas cloud? Yes Most saas have the possibility to create your room to use the online application, whether or freemium model with free access for 30 days or pay, and therefore meets the definition of cloud fast access to software and possibility to upgrade or remove users immediately (scalability).

Now from the standpoint of the provider, how many saas have mechanisms to “ensure” immediate access to the software? Do you have technology to offer? I’m afraid that most do not have it. Have multitenancy but not technology that ensures continuity of service (fast escalation, maintenance of current users, etc..) before a flood of new users who want to use the application.

And then, is the saas cloud computing or not? Being purists for saas should or have technology in their systems to meet demand given or at least rely on a service paas or IaaS that can provide coverage to the problem. But few of “saas have this problem” For fingers counted. The vast majority have control of growth (decline) of users more or less predictable and gives them time to size their systems to cover this problem. Some talk about it, if you need quick access to cloud computing resource is what you need, and this also applies to the SAAS .

And now back to the beginning of the text changes the word saas by paas and little else, and the reasoning is equally valid for the country. Although a paas without a rapid escalation mechanisms is much more difficult to find.

There are many definitions of public clouds, but in essence we are talking about approach, in which IT is not placed on your site, and users connect through a network of infrastructure that is not yours. We can distinguish cloud services in three models.

“Software as a service” (SaaS): This model is as old as the networking technology. Application is hosted in a third-party data center, users can connect to it and pay for its use as a public service – in proportion to consumption. Customers do not own any licenses to any equipment. They are connected to the application through a public or private network. SaaS makes sense for applications such as payroll, email or sales force automation. But this is not a complete list of applications needed to conduct business. If you like public clouds and if you can find the right solution, use SaaS. But we should not think that this is a complete strategy that satisfies your needs for IT. Very few companies will find a complete SaaS strategy to use IT.

“Platform as a Service” (PaaS): PaaS model means that servers, storage and IDE for a specific client applications reside with a particular vendor. For example, it may be owned by e-commerce platform. Customers write their applications and place them in the provider network, paying for megabytes and CPU. Various models of PaaS are most suitable for specific niche applications. In addition, they can be used to develop and test new software. However, this model is not sustainable and scalable solutions for strategic and other critical corporate applications. In addition, the promised supporters of this model reduce costs in the long term is very doubtful.

“Infrastructure as a service” (IaaS): This is a virtualized infrastructure without the physical, sometimes even without an operating system. You connect to it and do everything that you need. In essence, IaaS is a strategy for placement on another site, where IT assets are virtualized and made available to you according to your needs. This model is close reached to use other people’s insanity grounds in the 1990′s and early 2000′s. What is new is the extraction service providers economic advantages of virtualization technology. As it was the case with SaaS and PaaS, there are several very effective ways of using this model. However, it is in any case is not a panacea, does not guarantee cost savings or simplify the management needs of corporate IT.

Security: To share information in the public cloud is all the same like sending children to kindergarten without teachers, but still do not know where it is located. Parents will never do this. Likewise, the enterprises should not be placed in the public cloud environments for a 10 percent savings in operating costs. The risks are too great, and the economic effect is too small. This does not mean that the cloud providers do not take measures to protect your data. However, you as a customer must realize that whenever you no longer control the data, the security is at serious risk.

Economic aspect: Using public clouds, the company simply shift money from one pocket to another. Whatever is promised, service providers face the same problems of scalability, service quality and efficiency that arise within the enterprise. In addition, service providers are known for their inaccuracy in billing. This inaccuracy comes to the fact that any company whose sole task is to search for companies with which service providers charge excessive fees.

My advice: Enjoy the benefits of public clouds, but create private clouds on the basis of its own infrastructure in the media that have a full control.