Nainital History - History & Origin of Nainital Uttarakhand India

Nainital History - History & Origin of Nainital Uttarakhand India

Advantages And Disadvantages Of Using The Virtual Private Server (VPS)?

VPS, or virtual private server, is also widely known as virtual dedicated server, and dynamic dedicated server. There are two further types of VPS. They are: managed VPS hosting, which is more expensive than the unmanaged VPS hosting service. The VPS is essentially the economical bridge between the least expensive shared web hosting plan and the highly expensive dedicated web hosting plan.

There can be many VPS hosted on a single physical web server. The physical web server boots normally, and then uses a software to boot each VPS independently within a virtualization environment. The VPS has no direct access to the physical server’s hardware. The booting of VPS is done from a disk image. Almost all the web hosting companies offer the VPS plan to their customers. The managed hosting can be monitored and controlled using specific tools.

It is seen that most of the webmasters begin their website hosting on a shared web hosting server, chiefly because the shared web hosting plan requires a small fees compared to the more powerful Virtual Private Server (VPS), Semi-dedicated hosting server, or the dedicated hosting server. It is rightly so, because in the beginning, these webmasters are just trying to establish themselves on this huge internet.

Once they have mastered the skills of making money online and the needs of their website grows exponentially, these webmasters then move their website on to the more powerful web servers to take advantage of the commercial aspects and the usage benefits of these very powerful web servers.

The earlier shared web hosting plans for these webmasters become limited in their commercial aspects and the usability benefits, as their business grows and the need for more disk space, higher monthly bandwidth, more control over their website, need to use better web applications, having high-end e-commerce applications, overall security aspects, and needing better web features demand their growing websites to be using the more features that the VPS and the dedicated web servers offer.

The above are the various advantages and disadvantages of using VPS hosting plan. Obviously, the dedicated web servers offer the best features for such growing websites, but the cost of operating the dedicated servers and maintaining their web applications poses more difficulties to these webmasters. The best option in this case is to choose the virtual private server, also called the VPS web hosting. The VPS not only saves them lots of money, but also gives them additional benefits of being very powerful compared to the shared web hosting plan, and gives them many of the dedicated web server’s advantages.

Virtual Private Server (VPS)

A virtual private server (VPS) or a virtual web hosting server is a physical web hosting server which is pro grammatically divided into a number of sections. All these sections are virtual machines which act as a separate dedicated server for its user. These partitions are independent in the sense that every VPS using the physical server acts independently without risking any other partition, or the VPS present on that physical web server. All the resources like the physical RAM (random access memory) modules, central processing unit (CPU), disk space, and other such resources are not shared with other VPS present on that physical server. Even the operating system and its configurations can be used by each VPS user in different ways, as they may suit them.

Virtual web hosting (VPS hosting) plan can also provide many other advantages such as:

• The virtual web server can provide very flexible and convenient usage for the webmaster
• Other additional web applications can be easily used by the VPS
• Each VPS can be independently rebooted
• Every VPS has its own operating system
• Every VPS has its own copy of the operating service. Users can install and run any software that needs that operating system
• The webmaster can choose any type of operating system and web applications that he requires to run his website effectively
• It is as if the webmaster owns the ‘entire’ server without actually using the costlier dedicated web server. The VPS is very powerful and can offer similar features of the dedicated web server at a fractional cost
• VPS is quite stable and offers consistent service
• The webmaster can have access to the root level of the hosting server
• The VPS offers more freedom and features than the shared web hosting server
• The webmaster using the VPS can install any software which can be very beneficial for his growing business. The webmaster can be assured of highest compatibility between the softwares used and the operating system used for his VPS
• Each VPS is isolated from other VPS sharing the same physical web server. The resources used by each VPS on the physical web server can be centrally controlled by the web host
• Most VPS use the Linux-based operating system which has proven track-record of being more stable and secure than the more expensive Windows-based operating system
• VPS can allow the webmaster to host numerous websites very efficiently
• A VPS account will usually come with more services and tools from your web host – much more than what is offered with the shared web hosting service
• As the VPS is isolated from other websites, that is, the VPS does not interact with other websites present on the physical server, the security aspect of a VPS is much stronger than the risky shared web hosting server, where a harmful script or application used by another webmaster can harm your website
• There are many more powerful features that a VPS can offer you over the shared web hosting server

Disadvantages Of Using The Virtual Private Server (VPS)

There are also many other disadvantages associated with using the VPS. They are:

• The webmaster must possess high-proficiency in using the VPS to control the working of the website, the applications used, and the server resources skillfully
• As the VPS usually uses many web applications like the forums, chatting softwares, e-commerce forms, and other secure applications, if the webmaster is unable to control these applications professionally, they can become unmanageable because of the high traffic that they attract
• The hardware resources of the physical web server are still shared by the many websites that use the server, so your VPS may not be able to use maximum amount of RAM, disk space (although disk space problems can be more easily handled by replacing with a bigger hard-disk)
• VPS can have limited random access memory (RAM), central processing time, and server disk space

The above facts ascertain the importance of correctly using the VPS. It has more power, so more responsibility is also needed to control such powerful system. You can also check the powerful features of the dedicated web hosting server if your website really needs more power and greater features. Also, the dedicated web server offers you the entire physical server’s powers and features, and as in the case of the VPS, your server’s physical resources like the RAM are not shared with other users.

Remember that the great powers and features of the dedicated web server are available for expensive fees to you. So, if your website really needs more powers and features than the shared web hosting server, and if your website is not a very critically important e-commerce website, then opt for the VPS.

The VPS is quite economical and efficient, and offers excellent benefits for your website. When you consider the importance of your growing website that will not tolerate the amateur shared web hosting features but cannot yet afford the high-cost dedicated web hosting server, the VPS offers you the greatest possible benefits and advantages in carrying out unobstructed web service. VPS is being used by most of the online businesses quite powerfully, efficiently, and satisfactorily.

Ankit Kumar

http://www.slideshare.net/ankit.bhowali/cloudconfused-ankit

Virtual private server

Virtual private server (VPS) is a term used by Internet hosting services to refer to a virtual machine. The term is used for emphasizing that the virtual machine, although running in software on the same physical computer as other customers' virtual machines, is functionally equivalent to a separate physical computer, is dedicated to the individual customer's needs, has the privacy of a separate physical computer, and can be configured to run as a server computer (i.e. to run server software). The term Virtual Dedicated Server or VDS is used less often for the same concept, however it may indicate that the server does not use burst/shared ram through multiple machines, as well as individual CPU cores.

In addition to reducing hardware and power expenditures, virtualisation allows businesses to run their legacy applications on older versions of an operating system on the same server as newer applications.

Each virtual server can run its own full-fledged operating system and can be independently rebooted.

The practice of partitioning a single server so that it appears as multiple servers has long been common practice on mainframe computers and mid-range computers such as the IBM AS/400. It has become more prevalent with the development of virtualization software and technologies formicrocomputers.

The Guest system may be fully virtualized, paravirtualized, or a hybrid of the two.The physical server typically runs a hypervisor which is tasked with creating, releasing, and managing the resources of "guest" operating systems, or virtual machines. These guest operating systems are allocated a share of resources of the physical server, typically in a manner in which the guest is not aware of any other physical resources save for those allocated to it by the hypervisor.

In a fully virtualized environment, the guest is presented with an emulated or virtualized set of hardware and is unaware that this hardware is not strictly physical. The hypervisor in this case must translate, map, and convert requests from the guest system into the appropriate resource requests on the host, resulting in significant overhead. Almost all systems can be virtualized using this method, as it requires no modification of the operating system, however a CPU supporting virtualization is required for most hypervisors that perform full virtualization.

In a paravirtualized environment, the guest is aware of the hypervisor and interfaces directly with the host system's resources, with the hypervisor implementing real-time access control and resource allocation. This results in near-native performance since the guest sees the same hardware as the host and can thus communicate with it natively. UNIX-like systems, such as Linux, some variants of BSD, Plan9, andOpenSolaris are currently known to support this method of virtualization. However, installing operating systems as paravirtualized guests tends to require more knowledge about the operating system in order to have it use special hypervisor-aware kernels and devices.

Some examples of paravirtualization-capable hypervisors are Xen, Virtuozzo, Vserver, and OpenVZ (which is the open source and development version of Parallels Virtuozzo Containers).

Hybrid or partial paravirtualization, is full virtualization, but in which the guest uses paravirtualized drivers for key components such as Networking and Disk I/O, resulting in greatly increased I/O performance. As such, it is a common solution for operating systems which cannot be modified (for various reasons) to support paravirtualiztion.

One example of a hybrid hypervisor is Kernel-based Virtual Machine.

http://en.wikipedia.org/wiki/Cloud_computing

Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. Parallel to this concept can be drawn with the electricity grid, wherein end-users consume power without needing to understand the component devices or infrastructure required to provide the service.

Cloud computing describes a new supplement, consumption, and delivery model for IT services based on Internet protocols, and it typically involves provisioning of dynamically scalable and often virtualised resources. It is a byproduct and consequence of the ease-of-access to remote computing sites provided by the Internet. This may take the form of web-based tools or applications that users can access and use through a web browser as if the programs were installed locally on their own computers.

Cloud computing providers deliver applications via the internet, which are accessed from web browsers and desktop and mobile apps, while the business software and data are stored on servers at a remote location. In some cases, legacy applications (line of business applications that until now have been prevalent in thin client Windows computing) are delivered via a screen-sharing technology, while the computing resources are consolidated at a remote data center location; in other cases, entire business applications have been coded using web-based technologies such as AJAX.

At the foundation of cloud computing is the broader concept of infrastructure convergence (or Converged Infrastructure) and shared services.This type of data center environment allows enterprises to get their applications up and running faster, with easier manageability and less maintenance, and enables IT to more rapidly adjust IT resources (such as servers, storage, and networking) to meet fluctuating and unpredictable business demand.

Most cloud computing infrastructures consist of services delivered through shared data-centers and appearing as a single point of access for consumers' computing needs. Commercial offerings may be required to meet service-level agreements (SLAs), but specific terms are less often negotiated by smaller companies.

The impact that cloud computing has had on business is so great that the federal United States government is now looking to the cloud as a means to reorganize their IT infrastructure and to decrease their spending budgets. With top government officials mandating cloud adoption, many agencies already have at least one cloud system online.

JOkes.....!!!!

one DAY, naasa scientists found something is flying in mars. they become happy and shouts – ‘life on mars, life on mars’
later they found
that
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.
….
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.
rajnikant was flying a kite on mars from earth……………..

All scientist failed bt rajnikanth did…
Q-which liquid turns solid on heating?

Ans-DOSA…

Rajnikant’s ammunition suddenly got over and a villain came in front of him and instantly died coz,
.
.
.
.
.
.
.
Rajnikant shouted “DHISHKYAAOON”

once James bond shoot a person and say I’m bond, James bond.

climax:~

but the person catches the bullet and throw at bond & bond dies
the person says

“i m kanth, rajnikanth”