Azure Event Hubs

Azure Event Hubs is a fully managed, real-time data ingestion service that can receive and process millions of events per second. It serves as the front‑door for an event pipeline, enabling you to capture, buffer, store, and process large volumes of data from distributed applications and devices.

Getting Started

Follow these steps to create an Event Hub and send events using the Azure portal and .NET SDK.

  1. Log in to the Azure portal.
  2. Create a new Event Hubs namespace.
  3. Within the namespace, add an Event Hub and note its name.
  4. Configure a Shared Access Policy with Send permissions.

Send events with .NET


using Azure.Messaging.EventHubs;
using Azure.Messaging.EventHubs.Producer;

string connectionString = "<EVENT_HUBS_NAMESPACE_CONNECTION_STRING>";
string eventHubName = "<EVENT_HUB_NAME>";

await using (var producer = new EventHubProducerClient(connectionString, eventHubName))
{
    using EventDataBatch eventBatch = await producer.CreateBatchAsync();
    eventBatch.TryAdd(new EventData(new BinaryData("First event")));
    eventBatch.TryAdd(new EventData(new BinaryData("Second event")));
    await producer.SendAsync(eventBatch);
    Console.WriteLine("Events sent.");
}

Core Concepts

ComponentDescription
NamespaceA container for one or more Event Hubs, providing isolation and management.
Event HubA stream of events. Each hub has partitions for scalability.
PartitionA ordered sequence of events. Enables parallel processing.
Consumer GroupA view of the event stream, allowing multiple independent readers.
CaptureAutomatically persists incoming data to Azure Blob Storage or Azure Data Lake.

Code Samples

Explore official samples for different languages:

API Reference

Official REST API documentation: Event Hubs REST API

SDK reference docs: .NET | JavaScript

FAQ

How many events can Event Hubs process per second?
Throughput units determine capacity. One unit supports up to 1 MB/s or 1,000 events/s. Multiple units scale linearly.
What is the maximum retention period?
Retention can be configured up to 90 days for Standard tier and 365 days for Premium tier.

Additional Resources