Extract integrates with the database logmining server, which passes logical change records (LCR) directly to Extract.
Extract does not read the redo log. LCRs are stored in streams pool area.
如上摘自:GoldenGate Integrated Capture and Integrated Replicat Healthcheck Script (文档 ID 1448324.1)
由此可见:
ogg源头使用集成捕捉时,捕捉的数据流向为:redo log(或者 archived redo log)--->stream pool(LCR)--->OGG extract process (Integrated Capture)
本文详细解析了OGG集成捕捉技术下数据从redo/log文件到streampool区域,最终由OGGextractprocess处理的流程,深入理解数据流向。
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