Google Cloud Pub/Sub — Messaging

Pub/Sub topics, subscriptions, exactly-once delivery a BigQuery export.

Základy

gcloud pubsub topics create orders
gcloud pubsub subscriptions create order-processor \
  --topic=orders --ack-deadline=60 \
  --enable-exactly-once-delivery \
  --dead-letter-topic=orders-dlq --max-delivery-attempts=5

Push vs Pull

• Pull — subscriber stahuje zprávy, kontroluje throughput
• Push — HTTP POST na endpoint, ideální pro Cloud Run/Functions

BigQuery Subscription

gcloud pubsub subscriptions create bq-export \
  --topic=orders --bigquery-table=proj:dataset.orders \
  --use-topic-schema --write-metadata

Zero-code streaming do data warehouse.

Shrnutí

Pub/Sub = plně managed messaging s globálním reach. Exactly-once + BQ subscription = silný základ.