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Step 3 - Enabling Redundant Mirroring Sessions on SQL Server

This step is optional. You can enable Redundant Mirroring Sessions on the SQL Server.

The database encryption uses a certificate and a private key that is generated on the SQL Server when the databases are installed. This certificate and private key need to be created on any other server on which the encryption databases will need to be restored.

  1. Identify the three database servers shown below. If you do not know the name of your server, reference Microsoft’s documentation for information on obtaining the server name.
    • PrincipalDB (Primary) server
    • MirrorDB (Mirror) server
    • WitnessDB (Witness) Server
  2. Note the servers’ IP addresses.

  3. Copy the mirroring SQL files from this installation package to each of the three servers.

  4. Note the fully qualified domain name (FQDN) for each of the three servers.

  5. Create entries in the C:\windows\system32\drivers\etc\hosts file for each server, as shown below. principal witness

You must enter the actual hostname and DNS domain/suffix for each server. You cannot create placeholder hostnames in the hosts file.