VPS stand for virtual private server. We used to linked it with virtualization technology when we talk about VPS. But how many of us are truly understand the concept and features for VPS? It might be very less.
Virtual Private Server (VPS) is a marketing term used by internet hosting services to refer to a virtual machine for use exclusively by an individual customer of the services. We also used it as virtual Dedicated Server (VDS) in sometimes.
We know that there is a web hosting, VPS hosting and dedicated Server hosting in world of Internet. Normally what we describe all these 3 hosting are web hosting just same like condominium, VPS hosting is a Terace house and dedicated server hosting is a Bungalow. Can we assume Dedicated server hosting is always better and more powerful than VPS hosting and does it means VPS hosting is always having higher capacity and loads than web hosting? Well, what I can said is 50% from the above statement is correct. VPS hosting does not means better everything than web hosting.
You can search it from google about the hosting provider in the world, some of them are offering unlimited web hosting packages, which means you can enjoy unlimited data transfer, unlimited web space, unlimited domains using their web hosting packages. This can be done because most of them are using clustering and cloud technology for their web hosting. In this situation, VPS hosting is unable to do it. You will never able to see a hosting provider offering an unlimited VPS packages. In this case, if your web site having a heavy usage, I will suggest you better stay it back to web hosting or straight upgrade it to use dedicated server hosting.
What VPS over web hosting nowadays is control. You can have better control on your VPS hosting over your web hosting. You can have an administrator access to your VPS hosting rather than just a partially access to your web hosting. You can customize your server up to OS level according to your needs and requirement rather than encounter a lots of restriction for your web hosting.
There will be few criteria that you need to put some concern when you choosing a reliable VPS hosting provider. First must be a price, the price for the lowest packages should not more than $40. Besides that pricing, you also need to concern about the VPS technology that used by the provider. Basically there has 2 famous VPS technology being used by most of the provider, first will be OpenVZ’s concept and second is Xen’s concept.
OpenVZ is an operating system-level virtualization platform based on a single Linux kernel which has been modified to support multiple Linux Virtual environments (more commonly referred to as virtual private servers). The modified OpenVZ kernel isolates the file system memory and processes for each virtual environment, providing OpenVZ VPS administrators with full root access and all of the commands normally associated with a dedicated server.
Another technology is Xen. Xen is a paravirtualization platform which is very similar to hardware emulation. Paravirtualization works by creating an interface between the virtual environment’s operating system and the hardware which queues and responds from operating system modified to interact with the paravirtualization interface. This key difference from operating system-level virtualization allows Xen VPS administrators to modify their kernel modules, utilize swap space to meet memory allocation demands and watch their Xen virtual private server’s boot process as Linux mounts virtualized devices.
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