---
title: "PreProcessSegments"
slug: "preprocesssegments"
updated: 2026-06-03T09:27:45Z
published: 2026-06-03T09:27:45Z
canonical: "docs.datajet.app/preprocesssegments"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.datajet.app/llms.txt
> Use this file to discover all available pages before exploring further.

# PreProcessSegments

Processes *.tsv input files to create smaller input data files for ProcessSegments

| Key | Value(s) | Description |
| --- | --- | --- |
| method | "PreProcessSegments" | Processes *.tsv input files to create smaller input data files for ProcessSegments |
| sourcepath | "Path to input data" | Location of input files (Note: this should match the "sourcepath" key for [ProcessSegments](/v1/docs/processsegments)) |

Input files are in format *.tsv

Two types of pre-processed file are generated:

- *.tsv.hash
- *.tsv.hash.seg

Once pre-processing files have been generated, *.tsv files can be deleted. Pre-processed files are ~1/3 the size of *.tsv input files.

To use pre-processing files and enable performance enhancements, **ProcessSegments** must have the following property set:

```json
"intermediateMode": true,
```

![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/image-1780477240461.png)

```json
{
  "method": "PreProcessSegments",
  "sourcepath": "/home/datasources/campaignsource",
  "project": "campaign-full"
}
```