Does Event grid support Batch processing from Azure Function App?

Question

We are trying to implement an Event Grid system topic to fetch documents for batch processing through an Azure Function App. However, it processes a single file each time instead of batching. Could someone confirm whether Event Grid supports batch processing with Azure Function Apps?

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Answer 1

Hi Nagur Shaik,

Thank you for reaching out to Microsoft Q&A

Azure Event Trigger does not support batching. Reference: https://stackoverflow.com/questions/69572929/event-grid-batching-behavior

But Event grid does, so instead of using Event Grid Function you can use an HTTP-triggered Azure Function to receive the full array of events and process all blobs in one go. This lets you handle true batch logic in a single execution.

Another approach is using Blob Trigger: Blob Trigger always fires once per blob and does not support batching. To achieve batch processing, use an aggregation pattern such as Durable Functions or a queue-based approach. Each Blob Trigger invocation adds blob names to a queue or orchestrator, which collects items for a time window or count threshold and then processes them together as a batch.