Technology

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 What are the hardware requirements?

See our hardware requirements page for an example of a small cloud or proof of concept. We’re happy to advise you on requirements for a full cloud deployment – contact us.

 What virtualization technology do you use?

OnApp Cloud supports Xen, KVM, and VMware compute resources. 

 Why do compute resources require three NICs?

Having three NICs makes the cloud network more stable and easier to scale. There is less chatter internally and, therefore, less opportunity for failure because of bottlenecks between the SANs and the management network. From a cost perspective this helps maintain performance without additional hardware investment, too.

 What are templates?

OnApp templates are fully pre-configured operating system images that are used to build virtual servers. Using templates can result in a significant reduction in the installation, configuration and maintenance costs associated with cloud management. You can rapidly provision new virtual servers by using libraries of pre-configured templates, or create your own templates for future deployment of virtual servers.

 Can I create my own templates?

Yes, you can create your own custom templates from pre-configured Virtual Servers. It’s a simple process: configure a virtual server as required, back it up, and convert the backup to a template in just a few clicks.

 What operating systems can I run with OnApp?

The OnApp Control Panel and compute resource servers run CentOS (see the hardware requirements page for details). 

 Does OnApp support Active Directory Domain Controllers?

Yes. The only limitation is that it is not possible to change or reset the password if the Windows virtual server is used as a domain controller.

 Does OnApp Cloud support Windows 2008 virtualization mode?

No. Instead, OnApp uses GPL Paravirtualization drivers, which provide front-end drivers for the Xen block and network devices. This gives Windows much higher disk and network performance.