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Oracle Streams
Chapter 5 -
Apply Process Configuration

Apply Process Components

Apply architecture has three main parts:

  • The reader server

  • The coordinator process

  • One or more Apply servers

The following sections present these parts in more detail.

Reader Server:

This is the main component that mainly serves to dequeue the events. This is a parallel execution server that works out the dependencies between LCRs and assembles the events into transactions. It then returns the assembled transactions to the coordinator process, which assigns them to idle Apply servers.

The state of the reader server and other useful progress information for an Apply process can be viewed by querying the v$streams_apply_reader view. The STATE column shows the current activity being performed by the reader server. The STATE column can have any one of the following values:

The above text is an excerpt from:

Oracle Streams
High Speed Replication and Data Sharing

ISBN 0-9745993-5-2

by Madhu Tumma

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