Configure High Availability For SAN Data Servers

High availability data servers can be setup to get continuity and/or reliability for data protection and recovery operations using SAN Data Servers.



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Step 1: Setup SAN Data Server MediaAgents

  1. Install MediaAgent software on the SAN Data Servers. (For documentation purposes, this is referred to as SAN Data Server MediaAgent 1 with Library 1 and SAN Data Server MediaAgent 2, with Library 2.)

    For instructions, see MediaAgent Installations.

    • The following steps are crucial during this MediaAgent installation.

      Ensure that you select the MediaAgent and the SAN Storage Server packages during installation.

      From the Policy Selection page, do not select any storage policy from the Storage Policy list during the installation.

  2. Configure the libraries attached to these MediaAgents.

Step 2: Setup Clients with MediaAgents

  1. Install the MediaAgent software on all the clients that will backup data to the Data Server MediaAgents. (For documentation purposes, this is referred to as Client MediaAgents.)

    For instructions, see MediaAgent Installations.

    • During installation, select the MediaAgent package along with the packages that are needed on the client. (Make sure that the operating system is supported before you install. See Prerequisites above for supported operating systems.)
    • Do not select a storage policy, in the Policy Selection page.

Step 3: Share the Mount Path With All MediaAgents

  1. Verify and ensure that the mount paths are shared with all the MediaAgents setup in Step 1 and Step 2 above.

    For instructions, see Share a Mount Path.

    • Depending on your environment, make sure to select Data Server - FC or Data Server - iSCSI, from the Transport Type list,

Step 4: Setup High Availability Backups using Alternate Data Paths

  1. Create a Storage Policy with Deduplication enabled, using any one of the Client MediaAgents and Library 1.

    For instructions, see Creating a Storage Policy with Deduplication.

  2. All the MediaAgents that share the mount path (Step 3 above) will be automatically added as Data Paths in the Storage Policy.
  3. From the clients, configure the Subclients to use this newly created storage policy for backing up data.
    • Right the subclient and click Properties.
    • Click the Storage Device tab and select this newly created Storage Policy from the list.
    • Click OK.

Step 5: Setup High Availability Restores using Auxiliary Copy

  1. Create a secondary copy for the Storage Policy using Data Server MediaAgent 2 and Library 2.

    For instructions, see Creating a Synchronous Copy.

    • Add Data Server MediaAgent 1 and Library 1 as an additional Data Path. (Data Server MediaAgent 2 and Library 2 will be automatically included as a data path.)

      For instructions, Configuring Alternate Data Paths for Secondary Copies.

    • Enable the Write to a different library compared to source copy option from the Media tab of the Storage policy Copy Properties

    Note: This option is crucial and must be enabled to ensure that a copy of the data is replicated in the alternate library, ensuring high availability.

  2. Disable the System created schedule for Auxiliary Copies.

    For instructions, see Enabling or Disabling a Job Schedule.

  3. Setup a Auxiliary copy schedule using Data Server MediaAgent 1 as the MediaAgent. The schedule should be configured to run frequently, so that data is constantly replicated in the other library.

    For instructions, see Schedule Auxiliary Copies.

Step 6: Test your Setup

  1. Testing Backups
    • Temporarily disable Data Server MediaAgent 1 and run a backup from one of the clients.

      For instructions, see Disable a MediaAgent.

    • You will notice that the backup is routed to Library 2 using Data Server MediaAgent 2.

      For instructions, see Viewing Additional Job Information in the Job Controller.

    • Similarly, you can disable Data Server MediaAgent 2 and run a backup from one of the clients to verify that the backup is routed to Library 1 using Data Server MediaAgent 1.
  2. Testing Auxiliary Copy schedules
  3. Testing Restores

    You can test the restore using one of the following methods.