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Version: Next

Pub/Sub

  • Distributed messagin service

  • Serverless

  • Global scale message buffer/coupler

  • No-ops, global availability and auto-scaling

  • Decouple sender and receiver

  • Guarantee At-last-once delivery

  • exaclty-one delivery can only be available for pull method

  • Asynchronous messaging (ex: many-to-many) or other combination

  • Message are stored in Message Storage

  • Ensure end-to-end encryption (in-transit and rest)

  • Kafka Connect can be useb to link PubSub to Kafka

  • Supports many inputs and outputs

  • Patterns

    • One publisher to one subscriber
    • Fan-in or loadbalancer: multiple pub and multiple sub
    • Fan-out: one pub to multiple sub

Pull​

  • Subscriber must send and ack to the topic.
  • Messages are stored up to 7 days.

Push​

Subscriber respond only with 200 OK for HTTP call that tell to Pub-Sub the message delivery was successful.

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Commands​

  • Pull: gcloud pubsub subscriptions pull sub-name --auto-ack

IAM​

Example​

gcloud pubsub topics create sandiego
gcloud pubsub topics publish sandiego --message "hello"
gcloud pubsub subscriptions create --topic sandiego mySub1
gcloud pubsub subscriptions pull --auto-ack mySub1
gcloud pubsub subscriptions delete mySub1