Ensure a virtual machine does not carry a permanent state so that it can be easily provisioned, migrated, and managed in the cloud.
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Virtualization is the cornerstone for cloud computing, especially at the infrastructure level. With many virtual machines created, managing them becomes a big challenge.
Among these challenges are system provisioning, backup, archiving, and patching different virtual machines. These administrative tasks take lots of CAPEX and OPEX.
We need a better way to architect applications for the cloud.
Making a VM stateless solves a lot of problems. For one thing, you force applications to save data outside of the virtual machine. No longer do you need to back up the virtual machine – only the data. It also makes the system provisioning easier without differentiating the different instances. When the stateless VMs crash for whatever reasons, you don’t lose much. Just add a new virtual machine and voila!