Learn Cloud Computing: A trending technology and a buzz in the IT industry and most of you are so curious to know about it. Yes, we are talking about the cloud computing, one of the trending technology in the digital era. So here we are going to tell you all about the cloud computing and how it works and its advantages and benefits, Also cloud computing tutorial is also available here. This is also very important to know because the term “CLOUD” is very intriguing and most of the people are wondering that how do clouds whose main work is to rain can be used in computing. So let’s start to learn cloud computing and that too with an example.
You might had travelled many times by bus or train, so whenever you travel through any of these means of travelling vehicles you just take a ticket for your destination and hold up back to your seat till the time you don’t get reached to your destination. Likewise other passengers do the same take tickets and wait for their destination. And it hardly bothers you that where other passengers are going and as you reach to your destination you get off the bus. Same is with the cloud computing, it is just like the bus, that carries data and information for the various users you as well and allows all to use its services in minimum cost. So in this cloud computing tutorial you are going to learn about
Cloud Computing Tutorial Video & Pdf
Here are some of the contents that are covered in cloud computing tutorial.
- Different types of Cloud Computing
- Cloud Computing Services
- Cloud Computing Architecture
- Why use Cloud computing and Advantages?
- Grid computing as well as Utility Computing
- Virtualization and Cloud Computing
- Security Concerns in Clooud Computing
- Privacy Concerns
- Advantages of Cloud Computing
- Disadvantages of Cloud Computing
Why named as “Cloud”?
Most of you will be wondering that from where the word cloud came from so here is the answer to your question. The term “Cloud” came from the network design that was basically used by the network engineers to represent the location of the various network devices and also their inter-connection. The shape of the network was almost like a cloud so named as the cloud computing.
Why Cloud Computing?
As day by day users of mobile and computer are increasing, due to which data storage has become one of the priorities for this field. Much large as well as small-scale businesses today thrive on data and also spend a lot of money to maintain and secure this data. Cloud computing requires a storage hub and strong IT support. As most of the small scale businesses are not able to afford the costing of the in-house IT infrastructure and the back up support services. For all them cloud computing can be proved to be a cheaper solution. Also due to its best services like data storing efficiency, computation and less cost of maintenance have succeeded to attract even bigger businesses also.
Cloud computing directly minimises the software and hardware requirements form the user’s side. The only thing which the user will be able to run is cloud computing system, interface software, that can be as simple as the Web Browser and rest of the other things are taken care by the cloud. If cloud computing is new to you, then I also you have used it if you have used gmail, Hotmail, and yahoo all of them are just like what cloud computing offers to its users. As while accessing the email service the data is stored on the cloud server and not on our computer or hard drive. The technology as well as the infrastructure on which the cloud is based are not visible to us but still we are able to make use of its services. It is also not important that whether the cloud service is based on the Ruby, PHP, HTTP, XML or anyother specific technologies till the time it is user friendly and functional as well. Also an individual user can connect to the cloud system from their own device such as mobile, desktop or even a laptop.
Cloud computing is such a boon for the small businesses as it allows them to make of those technologies and services that were out of their reach.
Benefits of Cloud Computing
One of the major advantage of using the cloud computing services is that it very much cost efficient that’s why it is adopted most of the organizatios small or big. Cloud computing also offers the freedom to use the services as per the requirement of the individual or organization and also pay for the same what you use. Many other benefits of using cloud computing are as follows:
- Improved performance
- Lower costs of the IT infrastructure and computer costs.
- Less maintenance problems
- Various instant software updates
- Better and improved compatibility between the operating systems
- Back up as well as recovery
- Increased data safety
- More storage capacity
- Backup and Recovery
Various types of Cloud
There are mainly 4 different types of the cloud models that you can choose form according to your business needs:
- Private Cloud: Here , all the computing services are being deployed for only one particular organization. This model is basically used for the intra business interactions, where all the computing resources are owned, governed as well as operated by the single organization.
- Community Cloud: Here the computing resources/ services are provided for a whole community or organization.
- Public Cloud: This type of the computing resource is ideally used for the B2C type of interactions that means Business to Customer type. Here all the resources are owned as well as governed by government, academic or any business organization.
- Hybrid Cloud: This type of cloud makes use of both public as well as private cloud. So organizations using this type of cloud can take benefit of both public as well as private resources.
All these were the models that were offered by the cloud computing now we are going to tell you about the services of cloud computing.
- Software as a Service (SaaS)
- Platform as a Service (PaaS)
- Infrastructure as a Service (IaaS)
The services offered by the cloud computing are used as per the requirement of businesses.
SaaS (Software as a Service)
SaaS is a software distribution model where applications are hosted by the service provider or the vendor and are available to the customers via
SaaS is a software distribution model where applications are hosted by the service provider or the vendor and are available to the customers via internet. It has become one of the most preferred technologies which supports Service Oriented Architecture (SOA) or the web services.
This service is available to the users anywhere in the world. First of all, these software applications are required to be purchased and install it into on your own computer. The users of SaaS don’t follow this step, instead of this they subscribe to it on the monthly basis. There are so many tasks which can be easily performed using SaaS such as invoicing, sales, accounting and planning.
PaaS (Platform as a Service)
PaaS provides the environment and the platform and allows the developers to build the applications as well as services also. The service is then hosted in cloud and then can be accesses by all its users through internet. The services which are offered by the PaaS is constantly updated and many new features are also added on regular basis. Mostly web developers, software developers and businesses can take advantage of the PaaS. It provides the application to all its users a platform to support the application development. PaaS includes so many services such as networking, management services, testing, storage, deploying, collaborating, managing applications and hosting as well.
IaaS (Infrastructure as a Service)
It is one of the fundamental service along side the PaaS. IaaS provides the facilities to access the computing resources in the virtualized environment “cloud” on the internet. IaaS provides the computing infrastructure such as network connections, virtual server space, load balancers, bandwidth and ID addresses.
Cloud Computing Video Tutorial
Below is cloud computing video tutorial from which you can learn about all the aspects of cloud computing.This is one of the best cloud tutorial that you will find on the web.
Cloud Computing Architecture
Now let’s see what all components cloud computing is comprised of to understand it in much deep.
Cloud computing mostly consists of the two main parts or ends i.e. front end and back end. Front end is comprised of the client part of the cloud computing system. It consists of the applications and interfaces which are required to access cloud computing platform.
Whereas the backend part is referred to cloud, and consists of the resources which are required for the cloud computing services. Basically it consists of the virtual machines, data storage, servers and security mechanism etc. Backend is under the control of the providers. Cloud computing divides file system which spreads over the multiple hard disks as well as machines. Here the data/ information is never stored at a one place as if in case one unit fails then other one will take over automatically so that the data don’t get lost.
The user disk space has been allocated on to the distributed file system, where as another important part is the algorithm for the resource allocation. Cloud is one of the strong distributed environment that depends on the strong algorithm.
Virtualization and Cloud Computing
As most of the people are not aware of the fact that the main anabling technology for the cloud computing is virtualization. Virtualization can be defined as the division of the single physical server into the multiple logical servers. As once the physical server gets divided in to the many multiple logical servers then each of the logical server behaves as the physical server and can run the operating system as well as applications itself.
Many popular and known companies provide the facility of virtualization service, and instead of using your personal PC for the storage and computation purpose you just need to use their virtual server. As they are much cost effective, fast and consumes very less time. Vitualization is mainly used for the 3 main purpose such as:
- Network Virtualization
- Server Virtualization
- Storage Virtualization
So lets discuss all these three in detail.
Natural Virtualization: In natural virtualization, available resources are combined by splitting up the available bandwidth into the different channels, and each of it is independent from each other and that can be assigned to some specific server or the device in real time.
Server Virtualization: It is the process of masking of the resources of the server such as RAM, operating system, processors etc from the server users. The main working of server virtualization is to maximise the resource sharing and also the decrese the burden as well as complexity of the computation from the users.
Storage Virtualization: It is grouping of the physical storage from the various multiple network storage devices into the single storage device which is managed from the central console. It is basically used in the storage area networks (SANs).
To unlock the Cloud computing system, virtualization is considered to be as the main key, also the virtualization is important for the cloud as it decouples software from the hardware. For example if we see, Personal computers can use the virtual memory to borrow the extra memory from hard disk. Hard disk carries much more space as compared to the memory. Although this is also a fact that virtual disks are much slower than the real memory but if this can be managed properly then it can work much better. Also there is a software that can imitate like an entire PC, which means a single PC can perform all the tasks that 20 PCs will perform.
Cloud Computing Tutorial Pdf
Here we have also provided the cloud computing tutorial pdf format that everyone can learn from. Also most of the important aspects of the Cloud computing are also describes in the post as well, so you can also learn it from here. To download cloud computing tutorial pdf click on the below link.
Cloud Computing Vs Grid Computing
Have you ever thought that from where you get the electricity and how it is generated, and when you switch any of your electric device what is all behind it. The electricity or what we say power supply that we get at our homes travels through a chain of network which basically includes the power stations, power lines, transformers and transmission stations. All these components ltogether make a “Power Grid”. Like that only in cloud computing there is “Grid Computing” is an infrastructure which links all the computing resources like we can say servers, workstations, PCs and storage elements and also provides mechanism that re required to access the resources.
Grid computing can be considered as the middle point to communicate or to coordinate the disparate IT resources across a network which allows them, to functional as a whole. It is much more utilised in the scientific research and also in the universities for the educational purpose.
There is major confucion between the cloud computing and grid computing to most of the people, as there functions are almost similar but the approach they take are very different. So lets have alook that how they are operated.
|Cloud Computing||Grid Computing|
|· Cloud computing works more as a service provider for utilizing computer resource||· Grid computing uses the available resource and interconnected computer systems to accomplish a common goal|
|· Cloud computing is a centralized model||· Grid computing is a decentralized model, where the computation could occur over many administrative model|
|· Cloud is a collection of computers usually owned by a single party.
|· A grid is a collection of computers which is owned by a multiple parties in multiple locations and connected together so that users can share the combined power of resources|
|· Cloud offers more services all most all the services like web hosting, DB (Data Base) support and much more||· Grid provides limited services|
|· Cloud computing is typically provided within a single organization (eg : Amazon)||· Grid computing federates the resources located within different organization.|
Difference between Cloud Computing and Utility Computing
Above we learnt about the differences between the cloud computing and grid computing. So here let’s compare it with the utility computing. Utility computing is like that the electricity that we use as per requirement and then pay the bill for that, like that only cloud computing also uses the model pay as per the use. Utility computing is best for the Small busineesmall scale usage and it can be utilised in any server environment and it requires the cloud computing.
Utility is the method of providing all the service through as per the demand comes and pay per use billing method. The cient has the access of virtually unlimited supply of the computing solutions over the VPN or over internet that can be sources and used whenever required.
Small businesses can make use of the utility computing and that too in the limited budget and can use the software such as Customer Relationship Management without much investing on the infrastructure part to maintain the client base.
Here are some of the main differences between the utility computing and cloud computing.
|Utility Computing||Cloud Computing|
|· Utility computing refers to the ability to charge the offered services, and charge customers for exact usage||· Cloud Computing also works like utility computing, you pay only for what you use but Cloud Computing might be cheaper, as such, Cloud based app can be up and running in days or weeks.|
|· Utility computing users want to be in control of the geographical location of the infrastructure||· In cloud computing, provider is in complete control of cloud computing services and infrastructure|
|· Utility computing is more favorable when performance and selection infrastructure is critical||· Cloud computing is great and easy to use when the selection infrastructure and performance is not critical|
|· Utility computing is a good choice for less resource demanding||· Cloud computing is a good choice for high resource demanding|
|· Utility computing refers to a business model||· Cloud computing refers to the underlying IT architecture|
Security issues for Cloud Computing
While using the cloud computing one of the major issues that one feels is the security One of the concern while utilising the cloud computing is that the cloud providers have the access to the customers unencrypted data either it is saved on the disk, memory or is transmitted over network.
With all these concerns taking care of cloud computing provider companies have joined hand with the Trusted Computing Group (TCG), all of these are non- profit organizations that actually releases the set of the specifications to secure the hardware, create some self encrypting drives and to improve the network security. This actually protects data from the data kits and malware. Now cloud computing have been moved or expanded to many different types of the devices such as mobile phones and hard disk drives, so for that TCG have extended their security measures to include all these devices within itself. TCG provides the capability to create the unified data protection policy across all the clouds.
Some of the most trusted brands that offer cloud services are Gmail, Amazon, Box.net and many other.
Privacy concern & Cloud Computing
Privacy is one of the most important aspect in which most of the services get fail, also it is one of the strong barrier for all the users to adapt in the cloud computing systems. In the cloud computing this is the same issue of privacy. So, this is a major concern in which mot of the service providers still need to think.
Advantages of Cloud Computing:
- Fresh Software
With SaaS, the latest versions of the applications needed to run the business are made available to all customers as soon as they’re released. Immediate upgrades put new features and functionality into workers’ hands to make them more productive. What’s more, software enhancements are typically released quite frequently. This is in contrast to home grown or purchased software that might have major new releases only once a year or so and take significant time to roll out.
- Do more with less
With cloud computing, companies can reduce the size of their own data centres — or eliminate their data centre footprint altogether. The reduction of the numbers of servers, the software cost, and the number of staff can significantly reduce IT costs without impacting an organization’s IT capabilities.
- Flexible costs
The costs of cloud computing are much more flexible than traditional methods. Companies only need to commission – and thus only pay for – server and infrastructure capacity as and when it is needed. More capacity can be provisioned for peak times and then de-provisioned when no longer needed. Traditional computing requires buying capacity sufficient for peak times and allowing it to sit idle the rest of the time.
- Always-on availability
Most cloud providers are extremely reliable in providing their services, with many maintaining 99.99% uptime. The connection is always on and as long as workers have an Internet connection, they can get to the applications they need from practically anywhere. Some applications even work off-line.
- Improved mobility
Data and applications are available to employees no matter where they are in the world. Workers can take their work anywhere via smart phones and tablets—roaming through a retail store to check customers out, visiting customers in their homes or offices, working in the field or at a plant, etc.
- Improved collaboration
Cloud applications improve collaboration by allowing dispersed groups of people to meet virtually and easily share information in real time and via shared storage. This capability can reduce time-to-market and improve product development and customer service.
- Cloud computing is more cost effective
Because companies don’t have to purchase equipment and build out and operate a data center, they don’t have to spend significant money on hardware, facilities, utilities and other aspects of operations. With traditional computing, a company can spend millions before it gets any value from its investment in the data center.
- Expenses can be quickly reduced
During times of recession or business cut-backs (like the energy industry is currently experiencing), cloud computing offers a flexible cost structure, thereby limiting exposure.
- Flexible capacity
Cloud is the flexible facility that can be turned up, down or off depending upon circumstances. For example, a sales promotion might be wildly popular, and capacity can be added quickly to avoid crashing servers and losing sales. When the sale is over, capacity can shrink to reduce costs.
- Facilitate M&A activity
Cloud computing accommodates faster changes so that two companies can become one much faster and more efficiently. Traditional computing might require years of migrating applications and decommissioning data centers before two companies are running on the same IT stack.
- Less environmental impact
With fewer data centers worldwide and more efficient operations, we are collectively having less of an impact on the environment. Companies who use shared resources improve their ‘green’ credentials.
Disadvantages of Cloud Computing:
Common risks are:
- data loss or theft
- data leakage
- account or service hijacking
- insecure interfaces and APIs
- denial of service attacks
- technology vulnerabilities, especially on shared environments
- Net Connection:
For cloud computing, an internet connection is a must to access your precious data.
- Low Bandwidth:
With a low bandwidth net, the benefits of Cloud computing cannot be utilized. Sometimes even a high bandwidth satellite connection can lead to poor quality performance due to high latency.
- Affected Quality:
The internet is used for various reasons such as listening to audios, watching videos online, downloading and uploading heavy files, printing from the cloud and the list goes on. The quality of Cloud computing connection can get affected when a lot of people utilize the net at the same time.
- Security Issues:
Of course, cloud computing keeps your data secure. But for maintaining complete security, an IT consulting firm’s assistance and advice is important. Else, the business can become vulnerable to hackers and threats.
- Non-negotiable Agreements:
Some cloud computing vendors have non-negotiable contracts for the companies. It can be disadvantageous for a lot of businesses.
- Cost Comparison:
Cloud software may look like an affordable option when compared to an in-house installation of software. But it is important to compare the features of the installed software and the cloud software. As some specific features in the cloud software can be missing that might be essential for your business. Sometimes you are charged extra for unrequired additional features.
- No Hard Drive:
As Steve Jobs, the late chairman of Apple had exclaimed “I don’t need a hard disk on my computer if I can get to the server faster… carrying around these non-connected computers is byzantine by comparison.” But some people who use programs cannot do without an attached hard drive.
- Lack of full support:
Cloud-based services do not always provide proper support to the customers. The vendors are not available on e-mail or phones and want the consumers to depend on FAQ and online community for support. Due to this, complete transparency is never offered.
Sometimes, there are problems of software incompatibility. As some applications, tools, and software connect particularly to a personal computer.
- Lack of insight into your network:
It’s true cloud computing companies provide you access to data like CPU, RAM, and disk utilization. But just think once how minimal your insight becomes into your network. So, if it’s a bug in your code, a hardware problem or anything, without recognizing the issue it is impossible to fix it.
- Minimal flexibility:
The application and services run on a remote server. Due to this, enterprises using cloud computing have minimal control over the functions of the software as well as hardware. The applications can never be run locally due to the remote software.
To conclude, Cloud computing is a quickly changing area that will undoubtedly continue to play an increasingly major role for non-profits, charities, and libraries as well as their IT systems. But which elements of your IT infrastructure you should move into the cloud — and when — will vary a lot from organization to organization.
There are pros and cons of cloud but cloud has become a mandatory part of every business venture. Today, one cannot think without enjoying the benefits of cloud computing. With careful precautions and efforts, the disadvantages of cloud computing can be minimized. It’s true that cloud computing has rocked the business world. The pros outweigh the cons of cloud computing. The minimized costs, easy access, data backup, data centralization, sharing capabilities, security, free storage and quick testing speaks for itself. The argument becomes even stronger with the enhanced flexibility and dependability.
So this was all about the cloud computing tutorial, the tutorial is provided in the video as well as pdf format. For any query you can leave a comment below, we will reply you at the earliest.