Shared Hosting is a type of web hosting where multiple, generally hundreds, of websites runs on a single server within their own section. All the websites that are hosted on a shared platform shares a common Operating System and Hardware. In shared hosting the user don't have any control over the server OS and Hardware but do have their own control panel or FTP accounts.

Each website is allotted a certain amount of server resources, as provided by the hosting company. This is the most common and widely used method of providing web hosting service. In a shared server the user can get his desired features like number of email accounts, databases, domain hosting limit and type of OS, etc. at a very economical cost. 

The shared hosting is created by the server administrator using a control panel such as cPanel, Plesk Panel, Direct Admin, ISP Config, etc. or directly from the root access to the server and the domain is mapped to its hosting account via the IP address. The server administrator is responsible to install required softwares, scripts and the latest database patches. Since the parent server or the dedicated server is shared among the various users, shared hosting have certain limitations too. The website owner or the user can't control the server software and don't have direct access to the server. Further the server resources will also be allotted on the shared base among all the websites. Security aspect of the website is also questioned as the Operating System is also shared. So if there is any malicious website is found on the server it may infect other websites too. The server IP address is also same for all the websites but can be assigned on the requirement of the user.

Depending on the environment shared hosting have certain merits and demerits. Please have a look:

1. Server maintenance: In shared hosting since the user don't have access to the server he don't have to worry about the server maintenance and updates. The server administrator is himself involved in these activities. If seen economically then the price that you have paid for the hosting package includes charges for server maintenance too. On the other hand, this can be a demerit for user if he wants to have his own security level. In this case he will have to own a separate server like VPS or Dedicated Server.
2. Get what you want: When you are working on a shared platform you don't need to think for the complete server. Just take your share and start working. This sounds economically for the new-bees and for those who don't have very big or dynamic websites. On a shared server you are saving investments for the control panel, databases, OS and the hardware. But this saving may not seem good if your requirements increases.
3. Get start: For a new bee shared platform will be experience giving thing as the cost is less and will know in the long run as to what his needs will be. To start with the hosting industry shared hosting is good. Gradually you can increase your hosting platform and with some vendors you can get a desired hosting package as per you requirements with specific server resources.
4. Server Reliability and Usage: This aspect can be completely considered as a limitation of Shared Hosting. The hosting company may be the best in the industry or around you, but the server reliability is a second thing as the server is being used by the other user too. The server resources are also provided on limited base. Though the usage of the server resources can be 'unlimited' for you but its same for other users too.

After all shared hosting have certain merits and demerits, the equal importance is with choosing the good hosting package for your website and good hosting provider. 

In Virtualization, a Hypervisor is a software that servers as a mode of partitioning a physical server or host server into multiple OS based Virtual Servers or guest servers. A Hypervisor is responsible to allocate resources (CPU, RAM, HDD) of the physical server or a Dedicated Server among various Virtual Servers or Virtual Machines.

A Hypervisor provides a virtual platform to run multiple Operating System instances at once keeping each one of them unknown from one another. As said a Hypervisor partitions a physical server, here the Hypervisor have two types: 1) Native or bare metal or Hardware based, and 2) Hosted or Software based.

1.  Native or bare metal or hardware based Hypervisor: This type of Hypervisor runs directly on the hardware of the physical server and have full control on that hardware so as to provide separate OS instances to the guest servers. An example of this type of Hypervisor is VMware, XEN and Microsoft's Hyper-V. With so created Virtual Server is separated from other VMs that they are unknown with the fact that they are on the same 'parent server'. They are also called semi-dedicated servers and whatever the allocation is, in terms of hardware, its 'Dedicated' allocation.
2. Hosted or Software based Hypervisor: With this type of Hypervisor a pre-installed OS is required on the physical and so the control of the server is with the OS and not with the Hypervisor. It includes VMware workstatoin, Microsoft Virtual PC and Parallels Workstation are hosted hypervisors. 

The most used Hypervisors are either VMware or Hyper-V, though VMware is suggested and opted by many users and companies as VMware provides good features and  high level of scalability. With the new VMware Vsphere (vCloud) the cloud computing have become more common now a days as the user can scale his server in the run-time without affecting up-time.

Virtual Hosting, most commonly known as Virtual Private Servers, has become a very essential hosting platform when the users have become more conscious for better server up-time and multitasking. The concept of Virtual Hosting/Servers is also termed as Semi-Dedicated Hosting / Semi-Dedicated Servers.

In Shared Hosting the Operating System is shared among various Websites/Applications in a way that every user can access from that OS to their respective software/applications. In the Virtual Server a physical server is partitioned using any Virtualization Software giving a feel of a separate, individual server isolated from each other as in the Dedicated Servers. Virtual servers offers a high level of security as the user gets individual access to the server with freedom to install his own software and applications not bothering about the other users.

The most easiest way to understand Virtual Server is that in the Virtual Hosting the resources of physical server is allocated to various users/OS keeping them unaware of each other. Virtual Server is just an image of Dedicated Server giving user the feel of VIP platform within his budget. Each Virtual Server is capable of hosting its own Operating System and can be operated separately. This is important as it allows to run Applications and Softwares with high server resources on the convenience of the user. Also the users get complete control over the server so as not to bother the technical staff every time they need help.

A virtual server is created on a physical server, commonly known as 'Dedicated Server', using a Hypervisor that allocates resources to the so partitioned server. The hypervisor is responsible to manage and allocate resources of the Virtual Server. Though there are Types of Virtualizations and so are the Hypervisors and their respective features.

Since in a Virtual Private Server OS is separated from other VM's, users can run their own softwares and applications as per their convenience. But again since all the VM's are created on a single physical server or a Dedicate Server VPS's have limited CPU usage and RAM. When the user needs more than the allocated CPU, RAM and HDD its time to move to the next VPS configuration or to a Dedicated Server.

1.  Hosting Control Panel: The hosting control panel that your vendor is using should be well-known to you also as that panel will be helping you to upload your website content, creating email account, databases, etc. After purchasing the hosting account you will be using the hosting control panel most of the time and if you are not familiar to that panel it will lead to a headache and a matter of failure of your web hosting purpose. Make sure you ask for the type of control panel that your hosting vendor is using and confirm if you can get a demo of it.
2. Technical Support: At the time of sales there is one thing that will be mentioned everywhere “24/7/365 Technical Support.” Yes there is an all-time Technical Support available but what is the duration of solving the tech issues?? This is the point to be noted here. Get the customer reviews about your vendor (make sure the reviews are recent). You can also ask your support person, and can also take in written, about the Support Infrastructure.  
3. Hidden Costs: After purchasing the Hosting package you often need something more in extra. Like adding domain names, creating email accounts, database assistance, etc. Although these things are not that tough but still you may need it. What if you are charged for any of these? Take a clear picture of it before signing up hosting account.
4. Advance Payments: Are you overwhelmed with your hosting vendor? Every one of us often gets and makes some silly mistakes like depositing some advance payments of few thousand bucks that we can’t afford to lose. If you are new to Web Hosting or its first time with that vendor, then first try their services and then make any such decision.
5. Hosting Infrastructure: Here it means the server and the Datacenter layout of your hosting vendor. Generally, many hosting companies don’t have their own Datacenters. The servers are taken on rent, or they have their own Datacenters.   Further the Datacenters are Tier 3 or Tier 4 also matters in the terms of server up-time. If your vendor is using servers hosted on third party Datacenter then take a look at the Datacenter facility or can also see the customer reviews online.
6. Place your queries properly: At the time of inquiry we often fail to submit our queries clearly. This may lead to improper order. Keep in mind that your website is not what it will be in the next few months. For example if you are changing your website from static to dynamic then take that hosting package that will support the requirements of a Dynamic / E-commerce website. The best way to select a good web server is to ask slightly more than what you need.
7. Cost matters: The hosting companies always have some offers for their new customers. Sometimes you get very huge discounts at the starting time. This may become the reason to select that vendor. But take an assurance that the same offer is valid or not at the time of service renewal.

The well known Cloud Expo Europe is back this year on 29th - 30th January 2013 at Olympia, London. Cloud Expo Europe is one and only Expo for Business and Public sector organizations to get exposed to the cloud technology.

Being in its fourth year, Cloud Expo this year is promising with more knowledge and exposure to the cloud technology with 8 streams and 8 dedicated theaters along with Industry's top leaders and personalities in Europe.

Cloud Expo Europe is organized by CloserStill Media Pvt. LTD. as is its fourth year. Last year this Expo was adored with Best Trade Show, Association of Event Organisers (AEO) Excellence Award.
Cloud Expo Europe represents the fast-paced, dynamic and ever changing cloud computing industry; its conference content and show features continually evolve to mirror the needs of the cloud industry and those businesses implementing the latest cloud technologies. (CEE).

The speakers at this Expo includes IT Director - Unilever, Head of Technology - Met Office, Head of Architecture Solutions and Innovation – William Morrison’s Supermarkets, Co-founder & CEO – Bromium, Senior Researcher – CSC’s Leading Edge Forum, Cloud Architect – ebay, Founder & CEO – Nebula, Founder & CEO – Opscode, CTO – Terremark, Head of Software Development – Financial Times.

Over 6,000 attendees are expected to visit this year to see the latest developments and technological enhancements in Cloud industry.

List of Top Exhibitors

1.  Channel Cloud
2. Ctirix
3. Cloud Industry Forum
4. Data Core
5. Data Direct
6. ESNA
7. EVault, A Seagate Company
8. Firehost
9. Fusion IO
10. HP
11. I-Virtuals Ltd.
12. InterNAP
13. Nativecore
14. Navisite Europe
15. Peer1Hosting
16. Phoenix IT
17. RackSpace Hosting
18. RightScale 
19. Savvis
20. Science Logic
21. SoftLayer
22. SolidFire
23. Telecity Group

and many more...

So be a part of this great opportunity to get more close and clear to CLOUD. Get Registered today.