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Professional notes by Craig Johnston
long-form, short-form, working drafts · since 2008

VOL. XIX · MMXXVI
148 NOTES IN PRINT

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Tag: PySpark

1 NOTE

PostgreSQL to OpenSearch with PySpark on Kubernetes

Date-windowed ETL, idempotent upserts, and CronJob scheduling

KUBERNETESPOSTGRESQLOPENSEARCHPYSPARK

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Craig Johnston is a Chief Engineer at Deasil Works who wrote Advanced Platform Development with Kubernetes, and this site is the 2026 rebuild of that platform plus notes on MCP and Go.

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