# hdfs

> For the complete documentation index, see [llms.txt](https://docs.redpanda.com/llms.txt). Component-specific: [connect-full.txt](https://docs.redpanda.com/connect-full.txt)

---
title: hdfs
latest-connect-version: 4.93.0
latest-operator-version: v26.1.4
latest-console-tag: v3.7.3
latest-redpanda-tag: v26.1.9
docname: outputs/hdfs
page-component-name: connect
page-version: master
page-component-version: master
page-component-title: Connect
page-relative-src-path: outputs/hdfs.adoc
page-edit-url: https://github.com/redpanda-data/rp-connect-docs/edit/main/modules/components/pages/outputs/hdfs.adoc
page-git-created-date: "2024-05-24"
page-git-modified-date: "2026-05-26"
---

<!-- Source: https://docs.redpanda.com/connect/components/outputs/hdfs.md -->

**Type:** Output ▼

[Output](https://docs.redpanda.com/connect/components/outputs/hdfs/)[Input](https://docs.redpanda.com/connect/components/inputs/hdfs/)

**Available in:** Self-Managed

Sends message parts as files to a HDFS directory.

#### Common

```yml
outputs:
  label: ""
  hdfs:
    hosts: [] # No default (required)
    user: ""
    directory: "" # No default (required)
    path: ${!counter()}-${!timestamp_unix_nano()}.txt
    max_in_flight: 64
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""
      processors: [] # No default (optional)
```

#### Advanced

```yml
outputs:
  label: ""
  hdfs:
    hosts: [] # No default (required)
    user: ""
    directory: "" # No default (required)
    path: ${!counter()}-${!timestamp_unix_nano()}.txt
    max_in_flight: 64
    batching:
      count: 0
      byte_size: 0
      period: ""
      check: ""
      processors: [] # No default (optional)
```

Each file is written with the path specified with the 'path' field, in order to have a different path for each object you should use function interpolations described [here](https://docs.redpanda.com/connect/configuration/interpolation/#bloblang-queries).

## [](#performance)Performance

This output benefits from sending multiple messages in flight in parallel for improved performance. You can tune the max number of in flight messages (or message batches) with the field `max_in_flight`.

## [](#fields)Fields

### [](#batching)`batching`

Allows you to configure a [batching policy](https://docs.redpanda.com/connect/configuration/batching/).

**Type**: `object`

```yaml
# Examples:
batching:
  byte_size: 5000
  count: 0
  period: 1s

# ---

batching:
  count: 10
  period: 1s

# ---

batching:
  check: this.contains("END BATCH")
  count: 0
  period: 1m
```

### [](#batching-byte_size)`batching.byte_size`

An amount of bytes at which the batch should be flushed. If `0` disables size based batching.

**Type**: `int`

**Default**: `0`

### [](#batching-check)`batching.check`

A [Bloblang query](https://docs.redpanda.com/connect/guides/bloblang/about/) that should return a boolean value indicating whether a message should end a batch.

**Type**: `string`

**Default**: `""`

```yaml
# Examples:
check: this.type == "end_of_transaction"
```

### [](#batching-count)`batching.count`

A number of messages at which the batch should be flushed. If `0` disables count based batching.

**Type**: `int`

**Default**: `0`

### [](#batching-period)`batching.period`

A period in which an incomplete batch should be flushed regardless of its size.

**Type**: `string`

**Default**: `""`

```yaml
# Examples:
period: 1s

# ---

period: 1m

# ---

period: 500ms
```

### [](#batching-processors)`batching.processors[]`

A list of [processors](https://docs.redpanda.com/connect/components/processors/about/) to apply to a batch as it is flushed. This allows you to aggregate and archive the batch however you see fit. Please note that all resulting messages are flushed as a single batch, therefore splitting the batch into smaller batches using these processors is a no-op.

**Type**: `processor`

```yaml
# Examples:
processors:
  - archive:
      format: concatenate

# ---

processors:
  - archive:
      format: lines

# ---

processors:
  - archive:
      format: json_array
```

### [](#directory)`directory`

A directory to store message files within. If the directory does not exist it will be created. This field supports [interpolation functions](https://docs.redpanda.com/connect/configuration/interpolation/#bloblang-queries).

**Type**: `string`

### [](#hosts)`hosts[]`

A list of target host addresses to connect to.

**Type**: `array`

```yaml
# Examples:
hosts: localhost:9000
```

### [](#max_in_flight)`max_in_flight`

The maximum number of messages to have in flight at a given time. Increase this to improve throughput.

**Type**: `int`

**Default**: `64`

### [](#path)`path`

The path to upload messages as. Use interpolation functions to generate unique file paths. This field supports [interpolation functions](https://docs.redpanda.com/connect/configuration/interpolation/#bloblang-queries).

**Type**: `string`

**Default**: `${!counter()}-${!timestamp_unix_nano()}.txt`

### [](#user)`user`

A user ID to connect as.

**Type**: `string`

**Default**: `""`