What’s the main difference between VPS hosting and Cloud Server hosting?
VPS is short for virtual private server. It’s very similar to your VM (virtual machine) but generally associated with server operating systems (OS) whereas VMs tend to be more commonly referenced when owning a desktop OS.
In a regular VPS hosting situation there is a physical server that is running special software known as a hypervisor. This hypervisor creates “virtual” machines within the single main server that are each isolated and also have their own specific resources – RAM, CPU, Disk, etc. Popular hypervisors include VMware ESX, Microsoft Hyper-V, and both Xen and KVM running on Linux.
VPS hosting is great because for that most part it’s just like a physical server to both administrator along with the end-users. The fact that the hardware is definitely shared (aka multi-tenant) though provides added advantage of cost savings since instance effectively costs merely a fraction of the physical server.
Standard VPS hosting is not without a number of challenges though. One challenge is how the VPS runs around the single physical server and if there is an issue with that server, every server instance running around the server goes offline.
Another challenge is the combined resources of all in the virtual private servers combined cannot exceed the whole resources of the single physical server. If the resources around the server reach some maximum threshold, the VPS instances running there can will no longer scale up until the server is taken offline plus much more physical resources are added.
Additionally, as a result of this single resource pool situation, if a person or more VPS instances about the single server increase substantially in resource load, it may impact some other VPS running on that server.
In comes the cloud to save the day.
What a cloud VPS server solution adds are direct solutions to those three concerns. By definition if your host will be open and honest a â€œcloudâ€ solution should not run over a single server. Instead there should be a pool of redundant physical resources that operate both separate from each other and also together as a single entity. So there could be 10 servers within the cloud as well as any VPS servers running on that cloud would reach leverage the processor, memory, and storage facilities of these servers.
If a physical device in the cloud environment fails, it needs to have minimal or no impact to anything running around the cloud. If there is any impact, it must literally be measured in seconds like some time it takes a VPS to reboot.
Additionally, a correctly configured cloud environment will permit the VPS servers to go in real-some time and live without impacting operation between your different physical resources. This fact addresses both in the last two VPS concerns. Scaling out is don’t limited to one server, but can be done across a full cluster of servers. And when the cluster runs close to resources, more could be added live without impact to running operations. Plus, this fact of running on a cloud of resources means how the hypervisor might be used to balance the resources over the nodes and optimize performance. If one VPS is running excessively hard and starts to impact other clients, it could be migrated (again, live, without user impact) to a different node which includes more idle capacity.
This is usually the tip with the iceberg. Cloud VPS server hosting has so many benefits over standard legacy VPS hosting that I expect everyone will be running on the cloud server inside near future. There is really no good reason never to, but you will find plenty of why you should do so.