# 참고자료\_파라미터

## Overview

An initialization parameter describes a ProSync configuration. It is provided with a text file and required to create a ProSync.

An initialization parameter file is a text file, with a filename in the form prosync.cfg needed when starting a ProSync. It can be edited using a document editor provided with the operating system. Once the initialization parameter file is modified, the ProSync must be restarted to apply the modification to the entire system.

However, not all initialization parameters require the restarting of the ProSync after their modification. Some parameters can be modified while being used by an instance. These parameters are applied only to the current instance, not the initialization parameter file.

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## Class Attributes

This section explains the class attributes necessary for users to understand the information configured in the initialization parameter file.

| Group              | Class     | Description                                                                                                                                      |
| ------------------ | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
| Static/Dynamic     | Static    | A parameter that cannot be modified during system operation.                                                                                     |
|                    | Dynamic   | A parameter that can be modified during system operation.                                                                                        |
| Mandatory/Optional | Mandatory | A parameter required to start up a system. If these parameter are not defined in the initialization parameter file, the system cannot be booted. |
|                    | Optional  | A parameter that uses a default value if not defined in the initialization parameter.                                                            |

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