1.

Explain Principal, Mirror And Witness Servers in DB Mirroring?

Answer»
  • Principal Server:- The main server HOLDING a primary copy of the database and serving client application & requests.
  • Mirror Server:- The SECONDARY server which HOLDS a mirrored copy of Principal database and acts as a hot or warm standby server on basis Synchronous & Asynchronous configuration.
  • Witness Server: - The witness server is an optional server and it CONTROLS AUTOMATIC failover to the mirror if the principal becomes unavailable.


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