# Storage Integrations Overview

This guide will cover general prerequisites of your desired under storage system. To learn how to configure Alluxio with each individual storage system, please look at their respective pages.

## Prerequisites

In preparation for using your chosen storage system with Alluxio, please be sure you have all the required location, credentials, and additional properties before you begin configuring Alluxio to your under storage system.

For the purposes of this guide, the following are placeholders.

| Storage System                                                                                         | Location                      | Credentials                                                              | Additional Properties                                          |
| ------------------------------------------------------------------------------------------------------ | ----------------------------- | ------------------------------------------------------------------------ | -------------------------------------------------------------- |
| [Amazon AWS S3](https://documentation.alluxio.io/ee-ai-en/ai-3.1/ufs/s3)                               | `S3_BUCKET`, `S3_DIRECTORY`   | `S3_ACCESS_KEY_ID`, `S3_SECRET_KEY`                                      |                                                                |
| [HDFS](https://documentation.alluxio.io/ee-ai-en/ai-3.1/ufs/hdfs)                                      | `HDFS_NAMENODE`, `HDFS_PORT`  |                                                                          | <p>Specify Hadoop version:<br><code>HADOOP\_VERSION</code></p> |
| [Aliyun Object Storage Service (OSS)](https://documentation.alluxio.io/ee-ai-en/ai-3.1/ufs/aliyun-oss) | `OSS_BUCKET`, `OSS_DIRECTORY` | `OSS_ACCESS_KEY_ID`, `OSS_ACCESS_KEY_SECRET`, `OSS_ENDPOINT`             |                                                                |
| [COS](https://documentation.alluxio.io/ee-ai-en/ai-3.1/ufs/cos)                                        | `COS_BUCKET`, `COS_DIRECTORY` | `COS_ACCESS_KEY_ID`, `COS_ACCESS_KEY_SECRET`, `COS_REGION`, `COS_APP_ID` |                                                                |


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