Messaging on the Cloud
Google Cloud Platform Podcast
In the seventh episode of this podcast, your hosts FrancescΒ and MarkΒ discuss the different ways messaging can be done on Google Cloud Platform, covering Pub/Sub and Task Queues and when to choose what.
Links:
- Google Cloud Vision API blog post
- Photo Scavenger Hunt app
- Google Task Queues documentation
- Google Cloud Pub/Sub documentation
- Exporting logs documentation
Feature comparison
| Feature | Task Queues | Pub/Sub |
| Pull via API | Yes | Yes |
| Push via Webhooks | Yes | Yes |
| Max size of message | 100K | 10MB |
| At least once delivery guarantee | Yes | Yes |
| Batch Insert | Only in App Engine | Yes |
| Multiple receivers | No | Yes |
| Datastore Transactions | Yes | No |
| Maximum Messages/s | 1B (with billing) 250 msg/q/s | Unlimited (after request) |
| Throttling | Yes | No (if needed → pull) |
| Performance | median 5ms (99%ile 300ms) | Sub-second even when tested at over 1M msg/s |
| Cloud Monitoring | No | Yes |
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