Back up DPM using a secondary server

 

Updated: May 13, 2016

Applies To: System Center 2012 SP1 - Data Protection Manager, System Center 2012 R2 Data Protection Manager

Data and replicas on a DPM server can be backed up and protected by another DPM server in any of the following configurations:

• Primary to secondary protection—The database and replicas stored on a primary DPM server can be backed up to a secondary DPM server. If the primary server fails the secondary server continues to back up protected workloads. If the primary server fails you can do either of the following:

  • Rebuild the primary server and restore its database and replicas from the secondary server. Then move the protected workloads back to the primary server after the rebuild.

  • Select to switch protection to the secondary DPM server. With this setting you then restore to the protected computer directly from the secondary server when the need arises.

    For instructions, see Set up secondary servers.

• DPM chaining—A chain of DPM servers provide protection, and each server protects the next one in in the chain. For example:

  • DPM1 is protected by DPM2 (DPM1 is the primary and DPM2 is the secondary).

  • DPM2 is protected by DPM3 (DPM2 is the primary and DPM3 is the secondary)

  For instructions, see Set up chaining.

• Cyclic protection—One DPM server is backed up by another DPM server, and vice versa. So that DPM1 protects DPM2, and likewise DPM2 protects DPM1. This is useful for small environments.

DPM chaining

Before you begin:

• Each DPM server can only be protected once in the chain so verify they’re not protected by more than one server.

• Primary and secondary servers are established by the chain, so in our example above, although DPM3 is actually protecting DPM1 because it’s acting as the secondary server for DPM2, it can’t act directly as a secondary server for DPM1.

• If a DPM server is configured to protect its own data source the chain will be broken. For example if DPM1 protects its own database or system state, DPM2 can’t protect DPM1.

• Before you can protect the database of a primary DPM server you need to start the SQL Server VSS Writer service on the primary server.

Scenario 1: Chained protection

Scenario 1 shows a scenario in which four DPM servers are chained:

Server	Protecting	Protected by
DS1 (primary)	PS1, PS2	DS3
DS2 (primary)	PS3, PS4	DS3
DS3 (secondary)	DS1, DS2	DS4
DS4 (secondary)	DS3	-

Scenario 2: Chained protection

Scenario 2 shows a scenario in which four DPM servers are chained:

Server	Protecting	Protected by
DS1 (primary)	PS1, PS2	DS2
DS2 (primary)	PS3	DS3
DS2 (secondary)	DS1	DS3
DS3 (primary)	PS4	DS4
DS3 (secondary)	DS2	DS4
DS4	DS3	-

Cyclic protection

If you don’t want to use a secondary server then two DPM servers can protect each other.

Scenario 3: Cyclic protection

Scenario 3 shows a scenario using cyclic protection

Server	Protecting	Protected by
DS1 (primary)	PS1, PS2	DS2
DS2 (primary)	PS3	DS3
DS2 (secondary)	DS1, DS3	DS3
DS3 (primary)	PS4	DS2
DS3 (secondary)	DS2	DS2