# General Information

## Scanners and Importers

**Scanner** is the term used in  migration-center for an input adapter. It is used to read the data that needs processing into migration-center and is the first step in a migration project. 

**Importer** is the term used for an output adapter used as the last step of the migration process. It takes care of importing the objects processed in migration-center into the target system.

Scanners or importers have a unique name, a set of configuration parameters and an optional description. They work as a job that can be run at any time and can be executed repeatedly.

Scanners and importers are created, configured, started and monitored through **migration-center Client** but the corresponding processes are executed by **migration-center Job Server**.

For every run a detailed **history** and **log** file are created.

## History, Reports, Logs

A complete history is available for any Scanner or Importer job from the **History** window. It is accessible through the button/menu entry on the toolbar/context menu. 

The **History** window displays a list of all runs for the selected job together with additional information, such as the number of processed objects, the start and ending time and the status.

![](/files/-M7JjLQczqKBYKbLLBlS)

Double clicking an entry or clicking the Open button on the toolbar opens the **log file** created by that run. The log file contains more information about the run of the selected job:

* Version information of the migration-center Server Components the job was run with
* The parameters the job was run with
* Execution Summary that contains the total number of objects processed, the number of documents and folders scanned or imported, the count of warnings and errors that occurred during runtime.

{% hint style="info" %}
The amount of information written to the log files depends on the setting specified in the ‘loggingLevel’ start parameter for the respective job.
{% endhint %}


---

# 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.migration-center.com/3.17-update-4/general-information.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.