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| Term | Definition |
|---|---|
| Virtual Machine (VM) or Instance | A Virtual Machine or Instance is a virtual computer which has a number of processing cores called Virtual CPUs (VCPUs), Memory, operating system storage, virtual disks and virtual networks. Clouds allow many Virtual Machines to share the same underlying physical infrastructure allowing efficient and flexible use of shared resources |
| Flavour | The core resource allocations for a virtual machine - a flavour defines the number of vCPUs, memory and local storage allocated to the virtual machine when it is created. |
| Volume | An external and persistent block storage device, which can be attached to a virtual machine - effectively an external hard drive. Note a virtual machine has local storage which is tightly coupled to the virtual machine's life cycle, and will be deleted along with the virtual machine; volume storage is by default separate from the virtual machine and will persist even if the virtual machine is deleted. |
| OpenStack | OpenStack is an open source cloud operating system that controls large pools of compute, storage, and networking resources throughout a datacenter, all managed and provisioned through APIs with common authentication mechanisms. Beyond standard infrastructure-as-a-service(IaaS) functionality, additional components provide orchestration, fault management and service management amongst other services to ensure high availability of user applications |
| Hypervisor | A hypervisor or virtual machine monitor (VMM) is a piece of software that allows physical devices to share their resources among virtual machines (VMs) running on top of that physical hardware. The hypervisor creates, runs and manages VMs |
| Floating IP | An externally accessible IP address which can be attached to a virtual machine to allow external access. |
Openstack provides a number of underlying capabilities which are coordinated using a Web facing Dashboard which can be accessed via https://cloud.nci.org.au
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