Debezium - Capturing Data the Instant it Happens (with Gunnar Morling)
Developer Voices
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Optimizing Analytics Data Extraction Process
The process of extracting data for analytics involves acquiring the current position in the transaction log, starting a snapshot transaction to scan all relevant tables based on filter configurations, excluding soft-deleted data if needed. Once the snapshot is complete, reading the transaction log from the previously saved position ensures no changes are missed. Utilizing features like replication slots in databases like Postgres allows for exporting snapshots, starting multiple snapshot transactions at the same offset concurrently to speed up data extraction, and consuming from the replication slot to avoid missing any changes. This asynchronous process ensures a point-in-time query for accurate data extraction.
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