Estimate DPM server requirements
Applies To: System Center 2012 SP1 - Data Protection Manager, System Center 2012 - Data Protection Manager, System Center 2012 R2 Data Protection Manager
The number of System Center 2012 - Data Protection Manager (DPM) servers you’ll need to deploy will depend on a number of factors:
DPM server limits—Determine how many servers you need
DPM can protect up to 600 volumes, 300 replica volumes, and 300 recovery point volumes. To protect this maximum size, DPM needs 120 TB per DPM server, with 80 TB replica space with a maximum recovery point size of 40 TB.
A single DPM server can protect up to 2000 databases (recommended disk size 80 TB)
A single DPM server can protect up to 1000 client computers and 100 servers.
DPM has a snapshot limit of 9,000 disk-based snapshots on a single server, including those retained when you stop protection of a data source. The snapshot limit applies to express full backups and file recovery points, but not to incremental synchronizations. Note that the limit applies regardless of storage pool size.
DPM infrastructure requirements—These will determine how to locate the DPM servers.
DPM must be deployed in an Active Directory domain (Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 or Windows Server 2003)When deciding where to locate your DPM server, consider the network bandwidth between the DPM server and the protected computers. If you are protecting data over a wide area network (WAN), there is a minimum network bandwidth requirement of 512 kilobits per second (Kbps).DPM supports teamed network adapters (NICs). Teamed NICs are multiple physical adapters that are configured to be treated as a single adapter by the operating system. Teamed NICs provide increased bandwidth by combining the bandwidth available using each adapter and failover to the remaining adapter when an adapter fails. DPM can use the increased bandwidth achieved by using teamed adapter on the DPM server.Another consideration for the location of your DPM servers is the need to manage tapes and tape libraries manually, such as adding new tapes to the library or removing tapes for offsite archive.
A DPM server can resources in a domain, or across domains within a forest that has a two-way trust relationship with the domain that the DPM server is located in. If there is not a two-way trust across domains, you need a separate DPM server for each domain. A DPM server can protect data across forest if there’s a forest-level two-way trust between the forests.
Consider the network bandwidth between the DPM server and the protected computers. If you are protecting data over a WAN there’s a minimum network bandwidth requirement of 512 Kbps. Note that DPM supports teamed NICs that provide increased bandwidth by combining bandwidth available for each network adapter, and failover if an adapter fails.
For DPM server capacity planning you can use the DPM storage calculators. These calculators are Excel sheets and are workload specific. They provide guidance about the number of DPM servers required, processor core, RAM, and virtual memory recommendations, and required storage capacity. Because these calculators are workload-specific you’ll need to combine the recommended settings and consider them together with the system requirements, and your specific business topology and requirements, including data source and storage locations, compliance and SLA requirements, and disaster recovery needs. Note that the calculators were released for DPM 2010 but remain relevant for DPM 2012 and DPM 2012 R2.