Why it matters
Logs are debugging + audit foundation. Cloud Logging standard.
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The architecture
Log ingestion: auto from GCP services + custom.
Query: powerful log query language.
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How it works end to end
Log sinks: export to BigQuery, GCS, Pub/Sub.
Log Analytics: SQL over logs.
Retention: default 30 days; extend via sinks.
Cost: per GB ingested + stored.