Data updating replication software

Therefore, if an apply process applies changes that were captured by a capture process, then the apply process must be configured to dequeue LCRs from the buffered queue. The error queue contains all of the current apply errors for a database.However, if an apply process applies changes that were captured by a synchronous capture, then the apply process must be configured to dequeue LCRs from the persistent queue. If there are multiple apply processes in a database, then the error queue contains the apply errors for each apply process.An apply process is always associated with a single queue, and it dequeues messages from this queue only.A single apply process either can dequeue messages from the buffered queue or from the persistent queue, but not both.A downstream capture process requires fewer resources at the source database because a different database captures the changes.

uses an internal mechanism to capture data manipulation language (DML) changes when they are made to tables.For improved performance, captured LCRs are always stored in a .With downstream capture, redo transport services use the log writer process (LGWR) at the source database to send redo data to the database that runs the downstream capture process.is the process of sharing database objects and data at multiple databases.To maintain the database objects and data at multiple databases, a change to one of these database objects at a database is shared with the other databases.

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