Can we combine resources of multiple servers into 1 and then create multiple vps's from the combined resources? For Example: Lets assume i have multiple servers with different HDD, RAM and Processor sizes and with any tool / mechanism, i could combined their resources and create multiple VPS of different sizes?
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What you are looking for is called single system image clustering. While it is very interesting topic, but not very mature.
You can read about it more at https://en.wikipedia.org/wiki/Single_system_image
Martynas
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The number of resources (mainly CPU and RAM) used by all VMs on a single server can not exceed the resources available on this machine, so if you have only 16GB of RAM on each server, you could never use more then those 16GB for a single VM.
However, virtualization environments can operate in a cluster that allows to share some resources like disk space and to move virtual machines to other hardware while they are running. This is what things like vSphere, KVM or OpenStack clusters do.
Sven
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