> This page is for version 26.07 · v1.3.0.
> For other versions, use one of these documentation indexes:
> - Latest · v1.4.0 (26.09) (default): https://docs.nvidia.com/nemo/curator/latest/llms.txt
> - Main · preview: https://docs.nvidia.com/nemo/curator/main/llms.txt
> - 26.09 · v1.4.0: https://docs.nvidia.com/nemo/curator/v26.09/llms.txt
> - 26.07 · v1.3.0: https://docs.nvidia.com/nemo/curator/v26.07/llms.txt
> - 26.04 · v1.2.0: https://docs.nvidia.com/nemo/curator/v26.04/llms.txt
> - 26.02 · v1.1.0: https://docs.nvidia.com/nemo/curator/v26.02/llms.txt
> - 25.09 · v1.0.0: https://docs.nvidia.com/nemo/curator/v25.09/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/curator/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/curator/_mcp/server.

# nemo_curator.backends.internal.raft.ray_comms

## Module Contents

### Classes

| Name                                                            | Description                                                                |
| --------------------------------------------------------------- | -------------------------------------------------------------------------- |
| [`Comms`](#nemo_curator-backends-internal-raft-ray_comms-Comms) | Initializes and manages underlying NCCL comms handles across the a pool of |

### API

```python
class nemo_curator.backends.internal.raft.ray_comms.Comms(
    verbose: bool = False,
    nccl_root_location: str = 'ray-actor'
)
```

Initializes and manages underlying NCCL comms handles across the a pool of
Ray actors. It is expected that `init()` will be called explicitly. It is
recommended to also call `destroy()` when the comms are no longer needed so
the underlying resources can be cleaned up. This class is not meant to be
thread-safe.

**`nccl_root_location`** `= nccl_root_location.lower()`

---

**`sessionId`** `= uuid.uuid4().bytes`

---

**`valid_nccl_placements`** `= 'ray-actor'`

---

```python
nemo_curator.backends.internal.raft.ray_comms.Comms.__del__() -> None
```

```python
nemo_curator.backends.internal.raft.ray_comms.Comms.create_nccl_uniqueid() -> None
```

```python
nemo_curator.backends.internal.raft.ray_comms.Comms.init() -> None
```

Initializes the underlying comms.