The vCenter Server system is a physical machine or virtual machine with access to a supported database. The vCenter Server system and the vSphere Client machines must meet specific requirements.

CPU – 2 CPUs

Processor – 2.0GHz or faster Intel or AMD processor. Processor requirements might be higher if the database runs on the same machine.

Memory – 3GB RAM. Memory requirements might be higher if the database runs on the same machine.

vCenter Server includes a service called VMware VirtualCenter Management Webservices. This service requires 128MB to 1.5GB of additional memory. The VirtualCenter Management Webservices process allocates the required memory at startup.

Disk storage – 2GB. Disk requirements might be higher if the database runs on the same machine.

Microsoft SQL Server 2005 Express disk requirements – Up to 2GB free disk space to decompress the installation archive. Approximately 1.5GB of these files are deleted after the installation is complete.

Networking – Gigabit connection recommended.

See your database documentation for the hardware requirements of your database. The database requirements are in addition to the vCenter Server requirements if the database and vCenter Server run on the same machine.

CPU – 1 CPU

Processor – 266MHz or faster Intel or AMD processor (500MHz recommended).

Memory – 200MB RAM

Disk Storage – 1GB free disk space for a complete installation, which includes the following components:

Microsoft .NET 2.0

Microsoft .NET 3.0 SP1

Microsoft Visual J#

vSphere Client 4.0

vSphere Host Update Utility 4.0

You must also have 400MB free on the drive that has your %temp% directory.

If all of the prerequisites are already installed, 300MB of free space is required on the drive that has your %temp% directory, and 450MB is required for the vSphere Client 4.0.

Networking – Gigabit connection recommended.

When you have up to 200 hosts, you can use a 32-bit Windows operating system, but a 64-bit Windows operating system is preferred. When you have 200–300 hosts, a 64-bit Windows operating system is required.

Depending on the number of ESX hosts and virtual machines in your environment, the following system requirements should be used as guidelines for optimal performance.

Important

The recommended disk sizes assume default log levels. If you configure more granular log levels, more disk space is required.

Up to 50 Hosts and 250 Powered-On Virtual Machines summarizes the requirements for a medium deployment.

Up to 50 Hosts and 250 Powered-On Virtual Machines

Product

CPU

Memory

Disk

vCenter Server

2

4GB

3GB

vSphere Client

1

200MB

1GB

Up to 200 Hosts and 2000 Powered-On Virtual Machines summarizes the requirements for a large deployment.

Up to 200 Hosts and 2000 Powered-On Virtual Machines

Product

CPU

Memory

Disk

vCenter Server

4

4GB

3GB

vSphere Client

1

500MB

1GB

Up to 300 Hosts and 3000 Powered-On Virtual Machines summarizes the requirements for an extra-large deployment.

vCenter Server must be hosted on a 64-bit Windows operating system for this configuration.

Up to 300 Hosts and 3000 Powered-On Virtual Machines

Product

CPU

Memory

Disk

vCenter Server

4

8GB

3GB

vSphere Client

1

500MB

1GB

If you install vCenter Server on the E:\ drive or on any custom drive, note the following space requirements.

601MB on the custom drive for vCenter Server

1.13GB on the C:\ drive for Microsoft .NET 3.0 SP1, Microsoft ADAM, Microsoft SQL Server 2005 Express (optional), and Microsoft Visual C++ 2005 Redistributable

375MB for the custom drive %temp% directory