There are no hard limits and restrictions for the virtual servers’ creation in the OnApp Cloud, but we recommend following the next recommendation for the best performance:
CPU - it is possible to over-commit CPU cores. Based on current recommendations for KVM and Xen, we suggest not using more than 5x overcommit of virtual to real CPU load.
Memory - you can over-provision memory and the total amount of memory used in Dom0. The storage controllers and your virtual servers can not exceed the hypervisors’ RAM.
VDisk density - the limits on VDisk density depend on the amount of RAM provided by the storage controller, the datastore configuration and the types of VMs you are creating.
- The maximum number of IPs you can add to a VS based on Xen 4 hypervisor is 301.
- The maximum number of IPs you can add to a VS based on KVM hypervisor under Centos6 is 700.
Network interfaces: The maximum number of dummy network interfaces added to Xen 4/KVM 6 hypervisor which has been tested is 10.
For hypervisor limitations, see: