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Understanding and Using Q Replication for High Availability Solutions on the IBM z/OS Platform by Eduardo Pingarilho, Jayanti Mahapatra, Cecile Madsen, Heverson Campelo, Rich Briddell, Jason Arnold, Chuck Ballard

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The three-node scenarios
In this chapter, we show how Q Replication can be used to synchronize data between three sites. We describe different topology options, such as fully connected and not fully connected. We show various implementation options such as bidirectional (bidi) and multi-unidirectional (multi-uni). We also describe planned and unplanned outages with three sites.
While examining bidirectional replication, some significant Q Replication features are highlighted in the chapter topics, which include the following:
Conflict avoidance, ...

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