Strange inter-region replicaton for my PubSub instance

[davidshen84]

Hi,

I have a GAE app in the US, so I set up my PubSub in the US as well. I was charged for inter-region PubSub replication from the US to Australia. I don't have any app running in Australia.

The only thing I can think of is that I am in Australia, and I have a local tool to test the PubSub subscription. But in my test tool, I did not specify which PubSub region it should use, I only need to provide the project ID. So, I wonder how the client could connect to the Australia region and trigger the PubSub replication. Also, can I set my PubSub client to connect to the US region?

Thanks

[anjelab · Accepted solution]

A 1:1 support seems to be a much more suitable platform since this issue is specific to your project. A support dedicated to your issue can tap Billing support as well regarding your question with inter-region replication charges. 

As to your question with PubSub client connecting to another, I have found in this documentation pub/sub's load balancing mechanism:

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Publishers in multiple regions may publish messages to a single topic with low latency. Any individual message is stored in a single region. However, a topic may have messages stored in many regions. When a subscriber client requests messages published to this topic, it connects to the nearest server which aggregates data from all messages published to the topic for delivery to the client.