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Pub/Sub Message Ordering

Looking at Pub/Sub documentation and the new cloud console I noticed a reference to message ordering

tl;dr it looks like a key can be added to ensure that messages are pulled/pushed to subscribers in the same order pub/sub receives the.

But that doesn’t guarantee that they’ll be sent in the correct order the application is expecting – right?

Example Scenario:

A delay on the first message sent by an IoT device -> Pub/Sub causes it to be received second in line.

Pub/Sub could not detect this was actually supposed to be the first message in the order?

You’d still need DataProc to address this concern right?

1 Answers

Hi Ryan, I haven’t explored this new feature fully yet, but it does seem like that would be a consideration. For full control over ordering of streaming messages, I would recommend Cloud Dataflow.

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