# StreamQueueCheckpointer.FlushAsync(CancellationToken)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.streamqueuecheckpointer/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.streamqueuecheckpointer/methods/)

[Source](https://github.com/dotnet/orleans/blob/8bc9fd244427351ad24ccc039a9e7642a42c1cc4/src/Orleans.Streaming/Checkpointers/StreamQueueCheckpointer.cs#L122-L165)

```csharp
public Task FlushAsync(CancellationToken cancellationToken)
```

Flushes any pending checkpoint to persistent storage, ensuring the latest offset is durably saved. Called during shutdown or rebalancing to prevent message replay on restart.

### Parameters

- `cancellationToken` (`CancellationToken`): The cancellation token.

### Returns

A `System.Threading.Tasks.Task` representing the flush operation.