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 Distributed Processing  |  Question 12 of 19    Print  
What dynamic data replication?
 
Updating or Inserting records in remote database through database triggers. It may fail if remote database is having any problem.



  
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A  distributed  database  is  a  network  of  databases managed by multiple database  servers  that  appears  to a user as single logical database. 
Two-phase  commit  is  mechanism  that guarantees a distributed transaction either commits on all involved nodes or rolls back on all involved nodes to maintain  data  consistency  
Snapshots and SNAPSHOT LOGs 
     - Replication of data in distributed environment.     - Using snapshots to replicate data.     - Using remote procedure calls. 
 Snapshot is an object used to dynamically replicate data between distribute database at specified time intervals. In ver 7.0 they are read only. 
 Updating or Inserting records in remote database through database triggers. It may fail if remote database is having any problem. 
 We must be able to create a after row trigger on table (i.e., it should be not be already available) After giving table privileges. We cannot specify snapshot log name because oracle uses 

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