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# holoscan::DataLoggerQueueType

> Queue type selection for AsyncDataLoggerResource.

Queue type selection for [AsyncDataLoggerResource](../classes/asyncdataloggerresource).

```cpp showLineNumbers={false}
enum class holoscan::DataLoggerQueueType
```

Both queue types are fully thread-safe but offer different trade-offs:

* LockFree: Higher throughput, per-producer FIFO ordering only
* Ordered: Lower throughput, strict global FIFO ordering across all producers

---

## Values

| Name       | Description                                                     |
| ---------- | --------------------------------------------------------------- |
| `LockFree` | Lock-free queue (highest performance, per-producer FIFO only).  |
| `Ordered`  | Mutex-based queue (strict global FIFO order, lower throughput). |