Cisco WebEx Meetings Server is deployed on one or more virtual machines on ESXi hosts. CPU and memory resources, and storage space, is consumed by Cisco WebEx Meetings Server and by ESXi (VMware component that enables virtualization on the physical Cisco UCS Server). Depending on your system size, vCenter and multiple virtual machines may run on the same Cisco UCS server.

Cisco WebEx Meetings Server uses resource reservation for its virtual machines to guarantee system scalability. Other VMware workloads do not take CPU and other resources away from the virtual machines. The minimum requirements for each system size includes enough resources to support:

• Continued quality of service for Cisco WebEx Meeting Server at peak system usage (maximum capacity).
• VMware ESXi.
• VMware vCenter (when co-resident). For the requirements for vCenter Server, see Knowledge Base and search for "Installing vCenter Server 5.0 best practices" or "Installing vCenter Server 5.1 best practices", respectively.
• VMware snapshots of the virtual machine (delete these as soon as possible otherwise you may experience severe performance degradation). Extra disk space is required for snapshots, as some snapshots may be as large as the original virtual machine. In some cases, vSphere may delete snapshots to create storage space, compromising the ability to roll back to previous snapshots.
• Use of the Cisco UCS Server over the typical life cycle of the server.

Caution

Co-residency, other than the configurations listed in the following tables, is not supported. If you disregard our system requirements, your virtual machines may not be able to boot. The deployment of the virtual machines may stall from within the earliest product screens during the vCenter OVA deployment.

This is a schematic diagram of a 50 user system. The diagram illustrates two versions of a 50 user deployment. If you plan to add an HA system, those virtual machines are shown as the "redundant" virtual machines. If you do not want HA, then only deploy the primary system.

The following table lists the minimum hardware requirements for the ESXi hosts (Cisco UCS servers) in your system. For more information, see General System Requirements.

For more information about the bandwidth requirements, see Network Bandwidth Requirements.

Note	Because the resource requirements for ESXi 5.1 is greater than that for ESXi 5.0, Cisco requires additional CPU cores for a system deployed on vSphere ESXi 5.1.

Note	Co-residency with vCenter is supported with a 50 user system deployment as configured in the following table.

Note	For IOPS information, see Advantages of Deploying Your System on VMware vSphere.

Note	For brevity, we use the acronym IRP for the Internet Reverse Proxy in the following table.

Note	If you plan to use an HA system, purchase the same hardware requirements and quantities as the primary system.

Resources Reserved by the Virtual Machines in a 50 User System

This section illustrates how much media the virtual machines use and is intended for those with expert knowledge of VMware. CPU resources are specified as vCPUs (cores) and MHz (CPU cycles). The VMware VMkernel uses MHz cycles to control CPU scheduling.

Memory resources are specified by maximum memory and reserved memory. Reserved memory is not shared with other virtual machines on the same physical Cisco UCS Server.

Disk resources (storage) are controlled in two separate areas. During the OVA build, the CentOS filesystem partition sizes determine the minimum disk size. Secondly, vCenter controls the maximum disk space available.

Note	If you attempt to deploy a virtual machine without the minimum number of vCPUs, then the OVA deployment of the virtual machine will fail. If you attempt to deploy a virtual machine without the minimum total MHz, then the virtual machine will not power on.

This is a schematic diagram of a 250 user system. If you plan to add an HA system, those virtual machines are shown as the "redundant" virtual machines. If you do not want HA, then only deploy the primary system.

The following table lists the minimum hardware requirements for the ESXi hosts (Cisco UCS servers) in your system. For more information, see General System Requirements.

For more information about the bandwidth requirements, see the Network Bandwidth Requirements.

Note	Co-residency with vCenter is supported with a 250 user system deployment as configured in the following table.

Note	For IOPS information, see Advantages of Deploying Your System on VMware vSphere.

Note	For brevity, we use the acronym IRP for the Internet Reverse Proxy in the following table.

Note	If you plan to use a HA system, purchase the same hardware requirements and quantities as the primary system.

Resources Reserved by the Virtual Machines in a 250 User System

This section illustrates how much media the virtual machines use and is intended for those with expert knowledge of VMware. CPU resources are specified as vCPUs (cores) and MHz (CPU cycles). The VMware VMkernel uses MHz cycles to control CPU scheduling.

Memory resources are specified by maximum memory and reserved memory. Reserved memory is not shared with other virtual machines on the same physical Cisco UCS Server.

Disk resources (storage) are controlled in two separate areas. During the OVA build, the CentOS filesystem partition sizes determine the minimum disk size. Secondly, vCenter controls the maximum disk space available.

Note	If you attempt to deploy a virtual machine without the minimum number of vCPUs, the OVA deployment of the virtual machine will fail. If you attempt to deploy a virtual machine without the minimum total MHz processor speed, then the virtual machine will not power on.

This is a schematic diagram of an 800 user system. If you plan to add a HA system, those virtual machines are shown as the "redundant" virtual machines. If you do not want HA, then only deploy the primary system.

The following table lists the minimum hardware requirements for the ESXi hosts (Cisco UCS servers) in your system. For more information, see General System Requirements.

For more information about the bandwidth requirements, see Network Bandwidth Requirements.

Note	Co-residency with vCenter is not supported with an 800 user system deployment.

Note	For IOPS information, see Advantages of Deploying Your System on VMware vSphere.

Note	For brevity, we use the acronym IRP for the Internet Reverse Proxy in the following table.

Note	If you plan to use an HA system, purchase the same hardware requirements and quantities as the primary system.

Resources Reserved by the Virtual Machines in a 800 User System

This section illustrates how much media the virtual machines use and is intended for those with expert knowledge of VMware. CPU resources are specified as vCPUs (cores) and MHz (CPU cycles). The VMware VMkernel uses MHz cycles to control CPU scheduling.

Memory resources are specified by maximum memory and reserved memory. Reserved memory is not shared with other virtual machines on the same physical Cisco UCS Server.

Disk resources (storage) are controlled in two separate areas. During the OVA build, the CentOS filesystem partition sizes determine the minimum disk size. Secondly, vCenter controls the maximum disk space available.

Note	If you attempt to deploy a virtual machine without the minimum number of vCPUs, then the OVA deployment of the virtual machine will fail. If you attempt to deploy a virtual machine without the minimum total MHz, then the virtual machine will not power on.

This is a schematic diagram of a 2000 user system.

The following table lists the minimum hardware requirements for the ESXi hosts (Cisco UCS servers) in your system. For more information, see General System Requirements.

For more information about the bandwidth requirements, see Network Bandwidth Requirements.

If you plan to add a HA system, those virtual machines are shown as the "redundant" virtual machines. If you do not want HA, then only deploy the primary system.

Note	Co-residency with vCenter is not supported with a 2000 user system deployment.

Note	For IOPS information, see Advantages of Deploying Your System on VMware vSphere.

Note	For brevity, we use the acronym IRP for the Internet Reverse Proxy in the following table.

Resources Reserved by the Virtual Machines in a 2000 User System

This section illustrates how much media the virtual machines use and is intended for those with expert knowledge of VMware. CPU resources are specified as vCPUs (cores) and MHz (CPU cycles). The VMware VMkernel uses MHz cycles to control CPU scheduling.

Memory resources are specified by maximum memory and reserved memory. Reserved memory is not shared with other virtual machines on the same physical Cisco UCS Server.

Disk resources (storage) are controlled in two separate areas. During the OVA build, the CentOS file system partition sizes determine the minimum disk size. Secondly, vCenter controls the maximum disk space available.

Note	If you attempt to deploy a virtual machine without the minimum number of vCPUs, then the OVA deployment of the virtual machine will fail. If you attempt to deploy a virtual machine without the minimum total MHz, then the virtual machine will not power on.