VMware ESX 4.0 and vCenter Server 4.0 Edition


ESX and vCenter Server Installation Guide : System Requirements : vCenter Server and the vSphere Client Hardware Requirements

vCenter Server and the vSphere Client Hardware Requirements
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.
Minimum Requirements for vCenter Server
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.
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.
Minimum Requirements for the vSphere Client
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.
32-Bit or 64-Bit Operating System for vCenter Server
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.
Recommendations for Optimal Performance
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.
 
Table 2‑3 summarizes the requirements for a medium deployment.
Table 2‑4 summarizes the requirements for a large deployment.
Table 2‑5 summarizes the requirements for an extra-large deployment.
vCenter Server must be hosted on a 64-bit Windows operating system for this configuration.
Requirements for Installing vCenter Server on a Custom Drive
If you install vCenter Server on the E:\ drive or on any custom drive, note the following space requirements.
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