Since the release of the API in its 1.1 version, it is possible to pause and suspend instances.
![[Warning]](../common/images/admon/warning.png) | Warning |
|---|---|
Pausing and Suspending instances only apply to KVM-based hypervisors and XenServer/XCP Hypervisors. |
Pause/ Unpause : Stores the content of the VM in memory (RAM).
Suspend/ Resume : Stores the content of the VM on disk.
It can be interesting for an administrator to suspend instances, if a maintenance is planned; or if the instance are not frequently used. Suspending an instance frees up memory and vCPUS, while pausing keeps the instance running, in a "frozen" state. Suspension could be compared to an "hibernation" mode.
