Microsoft Lync Server 2010 : Lync Server Virtual Topologies (part 1) - Standard Edition Example, Enterprise Edition Example

11/28/2013 1:35:36 AM

1. Standard Edition Example

The first topology tested by Microsoft is based on a Standard Edition Front-End Server deployment and supports up to 2,000 users in the example. This topology is primarily geared toward smaller deployments with no need for redundancy or proof-of-concept scenarios where rapid deployment is a priority. This example also scaled to allow approximately 100 users concurrently connected to a single A/V conference before performance began to degrade. The Standard Edition virtual topology layout is depicted in Figure 1.

Figure 1 Standard Edition Virtual Topology

The host machine running Windows Server 2008 R2 had the following hardware configuration using a single virtual host:

• 2.26 GHz or higher CPU with four processor cores

• 16 GB RAM

• 500 GB SAS disk (RAID 0)

• Two network adapters

The virtual machine running the Standard Edition Front-End role used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

An important note here is that Microsoft recommends using a single host for any Standard Edition Front-End Server. If more Standard Edition Front-End Servers are used, each should have its own dedicated host server.

Note

When using this topology, Microsoft also recommends limiting the bandwidth used for application sharing to 150 Mbps. Allowing values past this point created excessive CPU usage. Use the Set-CsConferencingConfiguration –Identity Global –MaxBandwidthPerAppSharingServiceMb 150 command to set this value.

2. Enterprise Edition Example

The other topology Microsoft tested is an expanded Enterprise Edition deployment designed for very large organizations. This topology is scaled to support 40,000 users and used seven different virtual hosts. The logical layout of the Enterprise Edition topology is displayed in Figure 2.

Figure 2 Enterprise Edition Virtual Topology

Front-End Hosts and VMs

Two hosts were dedicated to run eight Enterprise Edition Front-End Servers with a machine running Windows Server 2008 R2 and the following hardware configuration:

• 2.26 GHz or higher CPU with 16 processor cores

• 64 GB RAM

• 500 GB SAS disk (RAID 0)

• Four or more network adapters

Each virtual machine running the Enterprise Edition Front-End Server role used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

A/V Conferencing Host and VM

The third virtual host server ran four different A/V Conferencing Server virtual machines. This offloaded A/V conferencing from the Front-End Servers to provide greater scalability. As with a physical deployment, for every 10,000 users, a dedicated A/V Conferencing Server should be deployed. The host had the following hardware configuration:

• 2.26 GHz or higher CPU with 16 processor cores

• 64 GB RAM

• 500 GB SAS disk (RAID 0)

• Four or more network adapters

Each A/V conferencing server virtual machine used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

Back-End Host and VMs

The fourth host server was dedicated to the Back-End SQL Server and Back-End File Server. It had the following hardware configuration:

• 2.26 GHz or higher CPU with 8 processor cores

• 32 GB RAM

• 500 GB SAS disk (RAID 1+0)

• Two or more network adapters

Each virtual machine running the Back-End SQL Server or File Server role used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

Monitoring and Archiving Host and VM

The fifth host server was dedicated to running a single virtual machine providing the Monitoring and Archiving roles with a collocated SQL Server database. The host had the following hardware configuration:

• 2.26 GHz or higher CPU with four processor cores

• 16 GB RAM

• 500 GB SAS disk (RAID 1+0)

• Two or more network adapters

The single virtual machine running the Monitoring and Archiving roles with a collocated SQL instance used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

Director Host and VMs

The sixth virtual host server was dedicated to running two virtual machines with the Director role installed. The host had the following hardware configuration:

• 2.26 GHz or higher CPU with eight processor cores

• 32 GB RAM

• 500 GB SAS disk (RAID 0)

• Two or more network adapters

Each virtual machine serving as a Director used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• One network adapter

Edge Server Host and VMs

The final virtual host server was dedicated to running two virtualized Lync Edge Servers. These were intentionally placed on a separate host for security reasons because the Edge Servers communicate with external hosts. The host had the following hardware configuration:

• 2.26 GHz or higher CPU with eight processor cores

• 32 GB RAM

• 500 GB SAS disk (RAID 0)

• More than four network adapters

Each virtual machine serving as a Director used the following configuration:

• Four virtual CPUs

• 15 GB RAM

• Two network adapters

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