What are Batched Notifications?
Batch notifications consolidate multiple individual notifications into a single message, delivered within a designated time frame. This approach differs from traditional systems that send a separate notification for each event, helping to reduce notification noise and enhance user engagement.
For instance, in a document collaboration app, rather than sending an email for every single comment, a batch notification system sends one email containing all comments made within the specified time window.
Designing a Batched Notification System
| Aspect | Batch on Write | Batch on Read | Our Approach |
|---|---|---|---|
| Method | Accumulate notifications into batches as events occur, optimizing lookups. | Periodically batch unsent notifications by querying them. | Batch on Write |
| Performance | More efficient with better performance and scalability. | Can be less efficient as data volume grows. | More initial effort required but offers better scalability. |
| Scalability | Higher scalability due to real-time batching. | Lower scalability, can be affected by data volume. | Higher scalability |
Database Design with MongoDB
| Collection | Description |
|---|---|
| notifications | Tracks individual notifications. |
| notification_batches | Tracks batched notifications. |
| notification_batch_notifications | Links individual notifications to batches. |
You can find the codes and implementation in this:
https://www.suprsend.com/post/building-a-batch-notification-system-with-mongodb-django-celery-and-sendgrid-for-developers
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