PubSub

3. Use cases

  • Balancing workloads in network clusters.
  • Implementing asynchronous workflows.
  • Aggregating log data from multiple systems.
  • Refreshing distributed caches.
  • Distributing event notifications.
  • Data streaming from various processes or devices.
  • Reliability improvement.

Use case scenarios

  • A large queue of tasks can be efficiently distributed among multiple workers, such as Google Compute Engine instances.
  • An order processing application can place an order on a topic from which it can be processed by one or more workers.
  • A service that accepts user sign ups can send notifications whenever a new user registers, and downstream services can subscribe to receive notifications of the event.
  • An application can publish invalidation events to update the IDs of objects that have changed.
  • A Google Compute Engine instance can write logs to the monitoring system to a database for later querying.
  • A residential sensor can stream data to back-end services hosted in the cloud.
  • A single zone Compute Engine service can operate in additional zones by subscribing to a common topic to recover from failures in a zone or region.