# MDBS

{% hint style="warning" %}
Do not make any changes to databases, tables or server settings unless you know what you do or are being told to do so by IRS support.
{% endhint %}

The Measurement Database System is a software bundle consisting of:

* Apache web server
* MySql database server
* PhpMyAdmin (database administration tool)

In the context of a LTT it is used for two different purposes:

1. for storing the LTT configuration in a database
2. for storing measurement values in a database

{% hint style="info" %}
The URL for the database administration is: <http://localhost/phpmyadmin>.
{% endhint %}

There is a GUI for visualizing measurement values from the measurement database. See chapter **LTT MesVis GUI**. You need to configure [data recording](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/datarecording.md) before measurement values are stored in database.

The MDBS installs automatically with the LTT installer and you need it to run the LTT GUI. The MDBS installs two Windows services in your system—the web server and the database server. Those services will automatically start with Windows.

You can start the MDBS control panel, which is located at `[Install Location]\55_LTT_MDBS\MDBS.exe`.

![MDBS](/files/dk4KuO1Kh1iCJOJZIoi4)

You have four buttons, each aligned together with an indicator, with which you can install/uninstall/start/stop the Apache or the MySql service. A green indicator shows that the service is installed/running, a gray indicator shows that the service is not installed/running.

![MDBS Active](/files/ae92powXn994IMnZxNgV)

The other buttons for MySql have the following meaning:

| Button      | Meaning                                                                                                 |
| ----------- | ------------------------------------------------------------------------------------------------------- |
| Console     | Opens a MySql console window. **This is for expert use only!**                                          |
| Admin       | Opens a local website for administering the MySql server (phpMyAdmin). **This is for expert use only!** |
| Data Folder | Opens the file location where all MySql databases are stored physically.                                |
| Error Log   | Opens the MySql error log.                                                                              |


---

# 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.irs.systems/ltt/documentation/ltt-gui-manual/mdbs.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.