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Professional notes by Craig Johnston
long-form, short-form, working drafts · since 2008
VOL. XIX · MMXXVI
148 NOTES IN PRINT

Tag: Data Engineering

3 NOTES
81

The Two Failure Modes That Break Your AI Data Agent

A Case Study in Agent Psychology
MCPLLMAIOPENSEARCH
2026-02-26
80

PostgreSQL to OpenSearch with PySpark on Kubernetes

Date-windowed ETL, idempotent upserts, and CronJob scheduling
KUBERNETESPOSTGRESQLOPENSEARCHPYSPARK
2026-02-25
65

Apache NiFi: Production Kubernetes Deployment

Apache NiFi Part 1
APACHE NIFIKUBERNETESDATA ENGINEERINGDEVOPS
2022-07-30