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If you want to enable High Availability for your cloud, please contact your account manager.

There are many factors that determine how many virtual servers you can run. Below you can find specifications for a Small Production Cloud, Medium Production Cloud and Enterprise Cloud.

An OnApp installation requires at least four physical machines – three for the Control Panel server nodes, and the other for the compute resource server. You can have as many compute resource servers as you need. You will also need storage for your virtual servers (a data store), and we recommend that you set up a separate server for storing backups and templates. 

On this page:

Need more help?

With the full version of OnApp Cloud you get free support from our integrations team to spec the exact hardware you'll need for your cloud deployment.


See also:

Server Config Reminder - supported versions of the servers

Software Requirements

Installation Guide for High Availability Clusters

Configure Cloud

5.0 Get Started - installation and upgrade guide for OnApp clouds without High Availability

Hardware Requirements for HA CP Servers



High Availability for the Control Panel ServerHardware requirements

Here you can find the minimum hardware requirements for control panel servers in a High Availability configuration.

Each of the Control Panel nodes in the High Availability configuration must comply with these requirements.


  • Processor: 2 x 8 Core CPUs, for example, Xeon e5-2640 v3

  • Memory: 16 GB RAM
  • Disks: 2 x 400GB SSD
  • RAID Configuration: RAID 1
  • Network Adapters: Quad port 1Gbp NIC

Suggested Specifications




Small Production CloudMedium Production CloudEnterprise Cloud
OnApp LicenseStarter Package +
Integrated Storage (add on)
Professional packageEnterprise Package
Number of Control
Panel (CP) Servers
333
Separate Database Server/ClusterNoNoOptional
Dedicated Backup Servers112
Number of Compute Resources (XEN/KVM)3816
Compute Resource Type (Static / Cloudboot)CloudbootCloudbootCloudboot
CP Server
Processor2 x 8 Core CPUs
eg. Xeon e5-2640 v3
2 x 8 Core CPUs
eg. Xeon e5-2640 v3
2 x 8 Core CPUs
eg. Xeon e5-2640 v3
Memory16GB RAM32GB RAM64GB RAM
Disks2 x 400GB SSD4 x 100GB SSD4 x 100GB SSD
RAID ConfigurationRAID 1RAID 10RAID 10
Network AdaptersQuad port 1Gbp NICDual port 1Gps + Dual Port 10Gbps
eg. Intel I350 + X520
Dual port 1Gps + 2 x Dual Port 10Gbps
eg. Intel I350 + 2 x Intel X520

Backup Server

Processor2 x 8 Core CPUs
eg. Intel Xeon e5-2620 v3
2 x 8 Core CPUs
eg. Intel Xeon e5-2620 v3
2 x 8 Core CPUs
eg. Intel Xeon e5-2620 v3
Memory32GB RAM32GB RAM32GB RAM
HDDs12x2TB SAS12x2TB SAS12x2TB SAS
RAIDRAID10RAID10RAID10
Network InterfacesDual port 1Gbp Intel NIC +
Dual port 10Gbps Intel NIC
Dual port 1Gbp Intel NIC +
Dual port 10Gbps Intel NIC
Dual port 1Gbp Intel NIC +
Dual port 10Gbps Intel NIC
Compute Resource

Processor2 x 8 Core CPUs
eg. Xeon e5-2640 v3
2 x 8 Core CPUs
eg. Xeon e5-2640 v3
2 x 8 Core CPUs
eg. Xeon e5-2640 v3
Memory128GB256GB256GB
HDDs8 x 400GB SSD8 x 400GB SSD8 x 400GB SSD
RAID ControllerPCIe gen3
eg. PERC H730, 1GB cache
PCIe gen3
eg. PERC H730, 1GB cache
PCIe gen3
eg. PERC H730, 1GB cache
RAID ConfigurationJBODJBODJBOD
Network InterfacesDual port 1Gps + Dual Port 10Gbps
eg. Intel I350 + X520
4 x 10Gbps
eg.
4 x 10Gbps
iSCSI SAN
TypeOptional Dual-Controller
Hardware SAN
Optional Dual-Controller
Hardware SAN
Optional Dual-Controller
Hardware SAN
HDDs12+ x SSD12+ x SSD12+ x SSD
RAID ConfigurationRAID10RAID10RAID10
Network HardwareSwitch with: 48 x 1GbE ports, 4 x 10GbE ports.
High performance switch with: 48 x 10GbE ports, 4 x 40 GbE ports
2 x High performance switch with: 48 x 10GbE ports, 4 x 40 GbE ports2 x High performance switch with: 48 x 10GbE ports, 4 x 40 GbE ports

Storage Hardware Requirements


If you are going to use OnApp Integrated Storage, make sure to meet the following requirements:

Integrated Storage Platform (by OnApp)Local Storage OnlyEnterprise SAN
  • Integrated Storage can group together any number of drives across any compute resource. We strongly recommend a minimum of 2 drives per compute resource to enable redundant data store configurations.
  • at least 1 dedicated NIC assigned per compute resource for the storage network (SAN)
  • IGMP snooping must be disabled on storage switch for storage network
  • minimum 1 dedicated partition in each compute resource
  • separate disk from the primary OS drive recommended
  • centralised Block Storage SAN (iSCSI, ATA over Ethernet or Fibre Channel) accessible to every compute resource
  • at least 1 dedicated 1GBit/s NIC assigned per compute resource for the SAN
  • multiple NICs bonded or 10GBit/s ethernet recommended
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