Cloud Pub/Sub is a fully-managed real-time messaging service for event driven systems that allows you to send and receive messages between independent applications. Features Capable of global message routing to simplify multi-region systems. Synchronous, cross-zone message replication and per-message receipt tracking ensure at-least-once delivery at any scale. Pub/Sub delivers each message at least once, so the Pub/Sub service might redeliver messages. You can declare independent quota and billing for publishers and subscribers. Cloud Pub/Sub doesn’t have shards or partitions. You just need to set your quota, publish, and consume. Key Concepts Topic It is a named resource to which publishers send messages. Subscription Is a named resource representing the stream of messages from a specific topic, to be sent to the subscribing application. Message The combination of data and attributes that a publisher sends to a topic and is eventually sent to subscribers. Message attribute A key...
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