# Field Remapper

### Overview

Field Remapper is a feature that allows you to add fields, delete fields, change field names or change the data type of fields in the data.

***

### Configure Field Remapper

To use Field Remapper, follow the instructions below:

1. In the **Processor information** section , enter general information for a processor according to the instructions in [Processor](https://docs-vngcloud-vn.translate.goog/vng-cloud-document/v/vn/vmonitor/dashboards/logs/lam-viec-voi-log-pipeline/processor) . In this content, you will choose **Processor type** as **Field Remapper** .
2. In the **Parsing rule** section , enter the following information:

* **Add fields** : add any pair of values. The added value pair must follow the structure **Field** , **Value** .
* **Remove fields** : delete existing fields in logs.
* **Rename fields** : change the name of the field.
* **Convert type:** change the data type of fields

For example:

<table data-full-width="true"><thead><tr><th>Items</th><th>Value</th><th>Meaning</th><th>Source logs</th><th>Destination logs</th></tr></thead><tbody><tr><td><strong>Add fields</strong></td><td><p>Key: codec</p><p>Value: rubydebug</p></td><td>Thêm field <strong>codec</strong> với value là <strong>rubydebug</strong> vào destination logs.</td><td>{ "@timestamp": "2023-08-02T06:35:08.017Z", "agent.id": "12002", "type": "vMonitor", "agent.hostname": "VNGCLOUD", "date": "2023-08-01T07:45:11.130Z", "client_ip": "45.61.164.120", "esc.version": "-" }</td><td>{ "@timestamp": "2023-08-02T06:35:08.017Z", "agent.id": "12002", "type": "vMonitor", "agent.hostname": "VNGCLOUD", "date": "2023-08-01T07:45:11.130Z", "client_ip": "45.61.164.120", "esc.version": "-" }</td></tr><tr><td><strong>Remove fields</strong></td><td>esc.version</td><td>Loại bỏ field <strong>esc.version</strong> khỏi destination logs.</td><td>nt</td><td>nt</td></tr><tr><td><strong>Rename fields</strong></td><td><p>Field: agent.hostname</p><p>Name: agent.host</p></td><td>Đổi tên field <strong>agent.hostname</strong> thành <strong>agent.host</strong> tại destination logs.</td><td>nt</td><td>nt</td></tr><tr><td><strong>Convert type</strong></td><td><p>Field: agent.id</p><p>Type: Integer</p></td><td>Chuyển loại dữ liệu của field <strong>agent.id</strong> từ <strong>string</strong> thành <strong>Interger</strong>.</td><td>nt</td><td>nt</td></tr></tbody></table>

<figure><img src="/files/K9hsnWZ0CSyKudUxESAW" alt=""><figcaption></figcaption></figure>

## Store and reuse Parsing rules <a href="#luu-tru-va-tai-su-dung-parsing-rule" id="luu-tru-va-tai-su-dung-parsing-rule"></a>

* You can store a parsing rule by checking **Save this rule** , then entering a memorable name for the parsing rule you want to store. The mnemonic name has a minimum length of 5 characters, a maximum length of 255 characters and can only include upper and lower case letters (az, AZ), numbers (0-9), and dots (.), space ( ), underscore (\_), hyphen (-), and the @ character.
* After the parsing rule has been stored, in subsequent processor creations you can reuse this rule by selecting **Rule presets** in the Pasing rule section.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.vngcloud.vn/vng-cloud-document/vmonitor/dashboards/logs/lam-viec-voi-log-pipeline/processor/field-remapper.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.