What is a VPS (Virtual Private Server) or Virtual Dedicated Server?

VPS or Virtual Private Server (also known as Virtual Dedicated Server) is the technique of creating multiple servers out of a single physical server. The main advantage of this method is to get rid of the expense of buying too many physical servers. The working of VPS is through a division of a single physical server into many logical servers. Each of these servers is capable of independent operation.

The attractive feature of VPS is the duplication of the physical server into servers that can execute on its own machine and has all the functionalities of a real server. The servers can be rebooted on its own and has an operating system on its own that can help independent execution.

The end user will never have to compromise on anything in VPS as the user is free to install any software compatible to the OS (Operating System) that is running in their server. There can be a few firewalls or anti-virus programs that hesitate to execute in a virtual environment, but they are not worthy of pointing as the disadvantages of VPS.

VPS allows better security to the multiple hosting environments. When the physical server is virtually split into two, it is possible to test the crucial modifications of software in either of the two servers. This spares the production level that is hosted in the partner, from crucial problems of updating. The software running in one of the Virtual Servers will never affect any other server connected to the same physical server. This ensures privacy and security among the independent servers in a VPS.

The main use of VPS was started with the mainframe architecture. This was to find a solution for reducing the expense of obtaining too many main frame servers which are also expensive. But technological advancements have made VPS useful in other architectures using Linux servers.

The simplest execution of the servers in this virtualization technique cannot access the hardware connected to the original physical server. The physical server runs a program once it starts working, which independently boots the multiple servers connected one by one. Virtualization can be implemented in two main ways. The software based virtualization allows the Virtual Servers to execute on the same kernel by sharing the resources of the physical server to which they are connected. In contradiction to this, hardware based virtualization allocates the hardware independently for each server through partitioning.

In VPS, the Virtual Servers can enjoy CPU, memory, bandwidth and all other resources just like a real server. They can handle multiple file systems in these servers. A highly efficient control panel permits the presence and management of multiple servers in the virtualized environment. It is by virtue of this highly advanced control panel that they are capable of installing software in their Virtual Server.

Because of the immense functionalities possible in Virtual Private Servers, they have become the favorite of the web hosting resellers. They can take maximum advantage of web hosting without incurring the expense of dedicated servers for the clients. This help the medium scale business to a great extend. This is proven to be far more advantageous than any other virtualization techniques available so far.

Why a VPS? -

VPS is ideal for those web developers who are technically advanced. Those who require access to the root server for their administrative purposes can go for a VPS hosting service. They aim at getting total control over the system.

Those who want a control over the resources in the server can choose a VPS. The control over space and the programs necessarily requires the system to be VPS. The users can allocate the resources as per the availability when he can carry out the administration of the environment.

If you are a business person aiming at making profit in your business, then VPS is a right choice for you. The cost needed to run your business will be very small if you are using multiple Virtual Servers. Your client can get many Virtual Servers at which he can access the server.

If you are a technically skilled person, you can host your web site using unmanaged VPS hosting. There you get complete control over your server. All the work including administration of the web server is at your disposal. This is suitable for small scale business.

If you are not skilled in the techniques of server hosting, there is managed VPS hosting that comes for your assistance. This will help you in large scale business. The users can out source a part of their administration work to the technical experts. The cost will be reasonable and need to pay once in a month.

The architecture of the system also influences whether VPS is a right choice for you. The main frame architecture which is really expensive suggests a VPS for your environment. The functionalities provided by Windows and Linux VPS should be studied properly before starting the working with VPS.

Before going for a Virtual Private Server, it is always advisable to seek the help of a technician. This will help you to get an idea of the entire virtual environment. The working and choice of the system is completely influenced by the business and the intension of use by the user. So a thorough picture about the web site and its intended result is necessary before selecting VPS for your web site development. This will help you to know if VPS is right for you

VPS Advantages -

VPS offers a lot of benefits to the small and medium businesses. The main advantage of VPS is the ability of each server to execute independently. The servers run on their own OS and resources. Each server has no access to the resources or software running on any other server connected to the same physical server. So when there is any problem in the working of one of the servers, the total performance is never affected. Only the affected server needs to be halted and all others continue delivering their service.

One of the main advantages of using VPS is the reduced cost in obtaining multiple physical servers. The expense required to get multiple resources and network can be lessened as the physical server is virtually partitioned. Each server has all the functionalities of a real server but at the same time there is no need of getting the real server for use. This is mainly beneficial when the servers of architecture like mainframe are too costly to buy. There you can emulate the servers and reduce the over all expense.

Each server has its own share of CPU, memory and bandwidth. They need not compete for these resources. The end result is a high performance system capable of doing multiple tasks for any number of users. The Virtual Servers never get access to the resources of other Virtual Servers in the system, though they can access the physical server through proper access requests.

The users can install their own software in their Virtual Server. The update or integration of this software in no way will affect other servers in the system. Users can never look into the data existing in other servers of the system. No transparency is available to the data or resources of the servers from another server of the system. Thus privacy and security is ensured in the system.

The servers have their own operating system. This allows for their rebooting without affecting the physical or Virtual Servers in the system. The highly efficient control panel helps in the up gradation of software in the Virtual Servers.

The traffic at the physical server can be divided into the Virtual Servers. This helps to get rid of the issues related to the demand for resources and servers in the system. The traffic at one of the servers will never slow down the performance or execution time of another server as complete isolation is provided in the virtualized environment.

Because of these advantages of Virtual Private Servers, they are in great demand in the business sectors. Those who are web hosting resellers use this technology to help their clients to get a server that has all the functions of the root server. This will help them to get more money at the expense of little cost from their pocket.

VPS Disadvantages -

One of the drawbacks of Virtual Servers is the problems related to maintenance by the hosting provider. The Virtual Servers have their own OS and software. The hosting provider needs to make sure that security and updates are offered without any issues.

The Virtual Servers can be sitting idle for a long time. Their resources will be unused at such times. This leads to failure of making the proper use of the available resources. To avoid this, the physical servers may not provide the real resources to the Virtual Servers. All this requires proper handling of the working of the virtual environment which demands effort from the part of the host.

The Virtual Servers work with the help of the resources allocated to them by the physical server. A minimum number of resources will be allocated as there are instances of wastage of the resources by the Virtual Servers. So when the Virtual Server has to face a high rise in the traffic, it may not be able to meet the challenges for resources. This slows down the performance of that server and can even put it in a halt state by want of resource.

There can be too many Virtual Servers connected to a single physical server. The same computer will have to handle their requests and integrate them properly which might fail at times. If any server happens to use other resources, rendering the services in time will be blocked. Speed and performance will have to be compromised. Mismanagement can lead to degrading the Virtual Server as a whole. This will violate the security and isolation policies of Virtual Private Servers.

These disadvantages can hinder the users from enjoying the benefits of Virtual Private Servers properly. But the advantages are so great and brilliant that, end user often forgets the negatives and prefer to go for VPS in their business. The ultimate aim is making profit from little investment which is highly possible through VPS. The benefits supplemented with the profit have always been the reason for the success of VPS.

Virtuozzo or Open Source VPS (OpenVZ) - Go with OpenVZ -

Virtuozzo VPS is a Virtual Private Server product introduced by SWsoft now Parallels and it is not a preferred platform. Virtuozzo is based on open source VPS (OpenVZ) but, has been productized by SWsoft as a revenue producing product and taken in a different direction. The Virtuozzo servers connected can share the hardware, load, traffic and even the software licenses between them. The Virtuozzo uses the virtualization implemented at operating system level. This has a high capacity that the maximum number of Virtual Servers that can be connected to a single server can vary from ten to hundreds.

The virtuozzo VPS demands the Virtual Servers to run on the same OS as that of their host server. The host running on Windows 2003 should have all the virtual environments (VE) to run on Windows 2003. Each VE can possess its own files, applications and processes and is capable of existing as if it were an independent server. The access is provided through inter connections in network.

The operating level virtualization used by Virtuozzo VPS partitions the kernel among the servers. The Virtual Servers run the instances of the kernel rather than a single kernel. This is a lighter method than other virtualization techniques and so adding up the load in the virtual environment is not a big deal in Virtuozzo VPS.

The critics of Virtuozzo VPS point out that since the OS is duplicated and there is actually only one server, the users who require more than one server for their development purposes, can't get the benefit from Virtuozzo VPS. Also they point out the lack of a high security and privacy in Virtuozzo. But SWsoft have numerous reasons to oppose these sayings about Virtuozzo VPS. They claim that Virtuozzo ensure security and isolation to the same extend that any other VPS offers. Even though they are running on a single OS, they are independent in having all files and libraries on their own.

Although, it has been the experience of many that Virtuozzo is a very expensive platform and has significant limitations thus, using an Open Source VPS (OSVPS) based on the current version of OpenVZ is a better solution technically and economically.

VPS Control Panel Options, Webmin with Virtualmin are clear leaders -

A powerful control panel facilitates the management of these multiple Virtual Servers connected to the physical server. The control panel helps the Virtual Servers to run their own OS. Another functionality is assisting the servers to install software without affecting the other servers connected to the host. Independent up gradation and installation of the software is made possible through the effective management of a complicated control panel in Virtual Private Servers.

VPS comes with different control panel options. These options assist the users to customize their VPS so as to make maximum use of VPS. The control panel options help those users who are less skilled to use VPS in a more convenient manner. The different options available are: Cpanel, Webmin with Virtualmin and Directadmin. All these are helpful to the users according to the purpose of use of VPS.

Cpanels are often rich in their features yet very expensive for hosting providers to sell. Although, this is the most common of the VPS control panel options, though changing quickly to Open Source VPS. There is maximum control provided to the environment in which the user is using the VPS. They can upgrade and modify the virtual private environment as required in their business or profession. A thorough knowledge in technology is not required to handle Cpanel VPS. Cpanel only works on Linux.

Webmin with Virtualmin is very powerful and useful for those users who expect much from their VPS. This helps to get rid of the need for a memory intensive control panel. There is flexibility to customize according to the need. The operating system and the software can be installed as per the requirements of the end user. This is intended for those users who are comfortable with Linux. There are VPS Hosting providers who give Webmin with Virtualmin as free with the VPS and these are truly the Open Source VPS providers.

Directadmin is the simplest of all control panel options. This is light in weight. The main uses are in the creation, updating or deletion of accounts. The manipulation of DNS records in the server is possible through Directadmin. The daily routines of the VPS become much easy with Directadmin. Only limited number of resources from the server is used by this control panel. Thus the business gets more resources for the working of the web site. This is mainly used by those end users who don't want the attractive features of Webmin with Virtualmin.

Thus the control panel options give the user more options to deal with VPS but, by far the Open Source platform of Webmin with Virtualmin is the best solution.

SSH Root Access -

SSH or Secure shell is mainly used for exchange of data in network. The protocol is mainly intended to help the exchange of data in a highly secured manner using the rules of the protocol. It is possible to get access to a remote machine and operate on it using the SSH protocol. This is referred to as SSH root access.

Through SSH root access; it is possible to login into any remote system. The user after logging can perform execution in the remote system through commands. The main advantage of SSH root access is as the name implies; it is highly secure as compared to other methods like rlogin or telnet. Even if the network is prone to insecurity, the SSG protocol ensures secure data transmission using encryption. The systems connected can exchange data through a communication of encrypted messages. Session compression is an added advantage of SSH root access. The transmission of TCP ports is possible through this channel.

The most important benefit of SSH in root access is the prevention of IP spoofing. It happens in the exchange of data in network that there can come messaged encrypted as packages and pretending to come from another host. There are host systems acting as routers. These will pretend to route data to the external network. SSH can even prevent these kinds of spoofing also.

SSH is highly secure in the sense that the hacking of password by mediator hosts can be prevented if the transaction is through SSH. The source of IP packets can be located properly and those packets which are not from trust worthy IP address can be neglected in the network. There are people who act as mediators and try to hack and spoof the data. These sorts of violations are not possible in SSH root access.

Before entering into a network to access a remote system, SSH handles authentication processes. The public/private key cryptographic methods are used to ensure the identity of the user requesting the access. As a result, there is no chance that a user can spoof as another user and login to the remote system for execution.

SSH works with the help of many configuration files. It caches the host names of all with which it had acquaintance. There is a list of the host names. This helps to make the authentication process faster. The only overhead in using SSH is the key pair generation. But since it is ultimately aimed at ensuring security, the users are benefitted much from SSH in accessing the remote system.

Why a Dedicated IP Address?

If a website has a unique IP address, That IP address could be referred as a dedicated IP. If you have a website of your own, its up to you decide whether you need a dedicated IP for your site, or you only have the need of a shared IP. Dedicated IP, as mentioned will be unique, whereas in shared IP, you are sharing the IP with other websites. Since IP addresses are becoming tougher to obtain, a majority of web hosters restrict themselves in providing dedicated IP to their website accounts. But, if the incorporation of a Social Security Layer deserve its place among the list of your website requirements, your preference in dedicated IP should never be compromised. E commerce sites and several other sites where credit card transactions rule the roost, SSL (social security layer) should be there, which implies the necessity of having a dedicated IP. Another factor supplementing the need of a dedicated IP include the fact of yielding better results in search engines. As a matter of the fact, each and every website, whether it is shared or dedicated, need to be shared by web servers. Here arises the relevance and importance of Virtual Private Server.

A server, obtained by an act of dividing or partitioning a single server to many or multiple servers where each server has all the attributes and properties of running a dedicated machine, can be termed as a Virtual Private Server. This practice is ever so common in Mainframe computers. Each partitioned Virtual Server seems to have its own operating system and each of them can be booted separately.

A Virtual Private Server gives the impression of an entire web server, having its own operating system. When you get the liberty to install any program or software you need, into your Virtual Private Server, it is as if it takes over the entire computer. It should specifically be noted that, each partitioned Virtual Private Server has its own disk space, RAM and bandwidth.

VPS Sharing Server Resources, CPU -

Virtual Private Servers are used to get multiple servers out of a single physical server. This is mainly used to reduce the cost incurred in providing many physical servers. This is done by logically splitting the physical server into many Virtual Servers. The attractive property of this is that, the Virtual Servers are capable of independent existence and so they won't affect the performance of one another. VPS is used for hosting web sites. Equal CPU sharing is a main term often heard in the virtual environment.

Usually the servers in the virtual environment are given a certain portion of the CPU. They are allowed to use a little above this maximum allocated amount of CPU. Thus they can use a share of the total CPU available. This share is referred to as equal share CPU.

The share is usually referred to as an equal share. But they are not actually equal. The server power will influence the share of CPU obtained by each Virtual Server. The amount of CPU received by a Power-2 VPS is of course greater than that received by a Power-1. This is the capacity difference of the Virtual Servers.

Though the servers vary their available share of CPU, there is often the bursting of the CPU resources by the Virtual Servers in the system. The servers keep track of the total available CPU. Though they never compete or wait for the CPU, they can share it on the basis of their need and the availability.

It is a point to be noted that, though the Virtual Servers never affect the performance of another Virtual Server connected in the virtual environment, when a high CPU usage is made by one server, it will surely affect the performance of other servers. To avoid this it is always better to make the servers possible to share the available CPU among themselves.

It is an important advantage of the virtual environment that the servers never have to compete for resources. There are enough resources available for the servers connected. Equal share CPU is a method that helps the servers to keep running without having to exhaust due to insufficient CPU. It is by virtue of this technique that the Virtual Servers deliver unending performance.

VPS Sharing Server Resources, RAM -

VPS's have two types of memory; guaranteed memory and burstable memory. In the simplest definition, guaranteed memory is the allowable memory for use in a VPS. It can be used whenever the user wishes. The memory allocated in VPS will vary. But the portion of the memory which can be put to use for functioning in VPS is generally called by the name guaranteed memory.

Guaranteed Memory never claims that you can't use memory more than that prescribed value. Rather it is the least amount that you can make use of. This is independent for each VPS connected to a single physical server. That is, even when the guaranteed RAM available for a Virtual Server is exhausted, it never affects any other server in the system. And the guaranteed RAM for each Virtual Server can be made use of at any time completely isolated from other servers in the system.

Guarantee RAM always refers to in the case of actual usage. That is if the required use of memory for the working is less than the guaranteed memory, then the memory can be put to use to the maximum limit. This is because the actual use is less than guaranteed memory.

Guaranteed RAM often remains the prime criteria for your selection of VPS services. So make sure that the memory guaranteed is sufficient for your use. This is because often the companies claim a high availability of RAM, but the net available RAM will not be enough for your use. Performance of VPS is directly proportional to the available guaranteed memory. So this should be the condition for choosing in the case of VPS hosting.

Guaranteed RAM plays a significant role in the selection of the platform also. It is always advisable to understand the memory guaranteed by Linux and Windows before making the platform chosen for VPS hosting. There are specific servers that help to burst the guaranteed RAM for use as burstable RAM which makes the total memory availability more.

VPS Sharing Server Resources, Burstable RAM -

The Virtual Servers are independent with their own operating system and resources. They can work on their own and even reboot without assistance from the main physical server. VPS is highly useful in web sites hosting where the clients can work on multiple servers simultaneously without any failure.

When understanding the concept of VPS, users are required to understand the term burstable memory. It is often confused with guaranteed memory even though there is considerable difference between the two. Guaranteed memory is defined as the usable memory out of the memory available in VPS. This is available for the user at all time. Very often this guaranteed memory can be changed to burstable memory by the VPS.

Burstable memory set a maximum limit for the memory available where as guaranteed memory is a minimum limit. That is, even if the guaranteed memory is exhausted, the users of VPS can use the memory up to the limit of burstable memory. The simplest example to understand the difference is: if the guaranteed memory of a VPS is 256mb and the burstable memory limit is 1024 mb, the users can use the remaining 768MB RAM once their guaranteed memory is completely used up. This is possible only if the host server has that much memory available with it.

It is always a procedure to keep certain part of the memory in host server as burstable. This can be used by the Virtual Servers when they are in need of extra memory. Also the guaranteed memory unused in any Virtual Server can be used by other Virtual Servers when they want burstable memory. It is known that guaranteed memory should be available for use for the Virtual Servers. So when they are in need of guaranteed RAM, they usually kill the processes that use their memory as burstable to get the memory released. So it is always better not to use the burstable memory unless it is so needed.

When trying to get a VPS server, it should be clearly understood that the memory availability that they demand is not burst memory. The guaranteed memory must be available in sufficient amount to get proper working in VPS. The memory burstable is not readily available always as it can be obtained only on a lapse of guaranteed memory by other Virtual Servers in the system.

When choosing the platform for VPS hosting, there should be a proper analysis of the memory availability. The Linux and Windows platform allow for using the extra guaranteed memory as burtsable. This is very essential for the use of the VPS for web site hosting. Memory should be the bottle neck in choosing the right Virtual Private Server for web site hosting.

Custom Name Servers -

Name servers are used to track the domain names of users inside the network. Generally every IP address is associated with a domain name in the network. This domain name is the name under which the site will be normally registered. The names help the users to keep in memory the servers as different from the IP address which are difficult to memorize.

Custom name servers are generally used to customize the names as the term suggests. This can be used to display the name of the domain in a different appearance quite different from the usual format. When the domain names are tried to track using whois the custom names are generally displayed to the user.

When the IP address is used to get the custom name, the reverse look up will provide the user with that information. Custom name suitably replaces the domain names in all registrations. The IP address is generally administrated by the users. So when the IP address look up is used, the information delivered will be the name of the user.

The custom name servers can be modified as required by the users, provided all the registration formalities are completed with the domain. The update can be performed only on an active domain. At the time of generating a custom name server it is advisable to create two name servers. These can be kept as the primary and secondary name servers for that domain.

IP address is the unique location address for any server. So when keeping a custom name for your server, it should be noticed that, the IP address for that domain is unique. And the primary and secondary names are to be given to two separate servers which are physically different also.

When you are customizing the name servers, it will be better if you try to keep the customization as much as unique as possible. The custom names can be used to reflect the name of the user. This will help to keep the custom name stand uniquely for the domain and the users will feel free to use it.

Linux VPS -

Linux is highly useful in that it offers a wide range of services for the end users. The web site hosting will be easier with Linux by virtue of the free services that Linux offers for hosting and running the web site. Linux can be combined to work with other systems in a simple manner to get added benefits.

Linux can join with Apache and PHP. This will bring about new methods in all the three together to get a better structure and format for web sites. A closer look will show that it is this attractive format that helped in the designing of most highly visited web sites in the internet.

Linux is preferred to windows because PHP can work better in collaboration with a Linux server as compared to a windows server. This is easily identified when the PHP scripts are loaded and find it difficult to handle in windows. Otherwise the difference is negligible. But when the heavy load is not suitable to work in a windows environment, Linux will prove to be the best partner for PHP.

Linux is much cheaper than windows. When you are a small scale business man aimed at making maximum profit out of your web site, Linux must be your choice.

There are certain disadvantages with Linux VPS hosting only if you are a windows fan. 90% of all servers are Linux and if you are using windows then good luck. Databases like Access are specially designed to work with Microsoft. They can be run in Windows only. If you have an access data base use in your hosting services, Linux will turn out to be not suiting your plan. But, why anyone would want to run any windows applications is beyond the comprehension of this writer.

The MSSQL database is intended to be used with Microsoft. Then the user can't use it in VPS hosting when he is relying on a Linux system. But for such users, they never have to repent as Linux is powerful to provide several other types of enterprise databases. Those users who are really interested in MSSQL will have to choose windows as their final option for VPS hosting. But, why anyone would use MSSQL when MySQL is far superior.

The .Net technologies can't work with Linux. The users who are opting .Net technologies in building their web site, the best choice is always Windows. The users can't rely on Linux platform to assist them, as Linux is not supporting .Net technologies. Even is they are not using ASP, Linux is not suitable for them. And why anyone would want to use .Net should have their head examined.

Make your life easy and just choose Linux.

Windows VPS, Only if you are a complete idiot -

If you are using .Net technology using ASP.net then you can find that it is not supported in Linux. If your web site is designed using Microsoft .Net technology then there is no compromise in the architecture and you will be forced to go for Windows. Even if you relax your need and prefer to go for ASP without .Net, there is no option in Linux and you will have to choose Windows.

If the web site has Access as the database, Linux won't suit for the design of that web site. Access is intended and designed to work with Microsoft. Hence in Linux web sites you have no option to work with Access databases.

Another restriction is in the use of MSSQL. It is designed specifically for Microsoft Windows. Linux provides various enterprise databases. But those users who want to go for MSSQL will have to choose Windows for VPS hosting.

SharePoint services of Microsoft can be used only in Windows. Front page 2003 can be used only in Windows platform. Hence Linux users can't use these features and so they will have to opt Windows VPS hosting.

Because of the perceived user friendliness that Windows provide, most users who are unskilled in the service will go for Windows as their platform for hostingVPS hosting, although there is no reason for such a flawed unfounded decision.

Plesk VPS Control Panel, Only if you like Breaches in Security -

Plesk VPS hosting is a web hosting service introduced by SWsoft that works by implementing the VPS method. The attractive feature of Plesk is a user friendly interface designed using graphics. This interface helps the users to interact with the system even if they are not that aware of the basics of VPS system. It replaces the command prompt system that was developed for these unskilled users.

Plesk is used mainly to develop web sites and accounts. There is a provision where the administrator of the server can make a template to know the required resources well in advance. This will ease the allocation of these entities for the users and the clients. Plesk also allows the flexibility of using in both windows and Linux.

In terms of security Plesk often have to face many criticisms. The system is not that secure as the users share the same resources. They can access the files of other servers connected in the system. Accessing the root system and exploiting the resources is also possible in Plesk VPS hosting.

There are many disadvantages for Plesk. This includes the insufficient data backup facility. Plesk has no feature of loading the files into FTP servers. Thus the files are saved only in the server disk. This will lead to insufficient data storage for the large files. The result is that the administrators prefer to go for backup. This results in storage insufficiency or wastage of space improperly.

Plesk has several restrictions that prevent the user from accessing several applications. Though these are negative remarks of Plesk VPS hosting, there are several positive aspects for Plesk. They include the ease of use that plesk offers the users. It is highly secure and stable. There is a huge selection of language and this option supplements the interest of users in plesk. The automation keeps the users benefitted of the latest advancements in technology.

The reduced expense and the user friendliness have always made Plesk the best of the Virtual Private Servers hosting systems. The administration of the web sites is no longer a head ache and the management task is more simplified and great for being Hacked.

Plesk VPS hosting is a web hosting service introduced by SWsoft that works by implementing the VPS method. The attractive feature

The only Choice - Open Source VPS -

Open Source VPS Hosting Service Providers like the ones listed on the top of the page are the new future of VPS hosts.  Open Source gives the customer the maximum flexibility in control of their VPS.