Ensuring Data Security: Backup and Recovery Mechanism of Doris Database

# 1. Introduction to Doris Database

Doris is a high-performance, cost-effective, and highly reliable OLAP database based on the MPP architecture. It utilizes distributed storage and computing technology, capable of handling massive amounts of data and providing rapid, real-time query responses.

The advantages of Doris include:

- **High Performance:** Doris employs an MPP architecture that can parallelize query tasks across multiple nodes, thereby enhancing query performance.
- **Low Cost:** Doris utilizes inexpensive hardware such as standard servers, which can reduce deployment and maintenance expenses.
- **High Reliability:** Doris adopts a multi-replica mechanism that ensures data reliability and prevents data loss, even if node failures occur.

# 2. Doris Database Backup Mechanism

### 2.1 Types of Doris Database Backups

Doris provides two types of backups: full backup and incremental backup.

#### 2.1.1 Full Backup

A full backup copies all data in the database, including metadata and user data, to the backup storage. It is a complete replica of the database and can be used to recover from data loss.

#### 2.1.2 Incremental Backup

Incremental backup only backs up the data that has changed since the last full or incremental backup. It is faster and smaller than full backup but requires a full backup to restore.

### 2.2 Doris Database Backup Process

The Doris database backup process includes the following steps:

#### 2.2.1 Backup Preparation

* Ensure the database is in a consistent state.
* Determine the backup type (full or incremental).
* Select the backup storage location.

#### 2.2.2 Backup Execution

* Use Doris's built-in br tool or third-party tools to execute the backup.
* Specify the backup type, location, and other related parameters.

br backup --type=full --path=hdfs://backup/path

* The database will continue to run normally during the backup process.

#### 2.2.3 Backup Verification

* Verify that the backup has been successful.
* Use the br tool's verify command to check the backup integrity.

br verify --path=hdfs://backup/path

# 3.1 Doris Database Recovery Types

Doris supports two recovery types: full recovery and incremental recovery, as detailed below:

#### 3.1.1 Full Recovery

Full recovery involves restoring the entire Doris database from a backup, including all data tables, partitions, and metadata. Full recovery is typically used in the following scenarios:

- The database has experienced severe failures or data loss and needs to be restored from scratch.
- The database needs to be migrated to a new server or cloud platform.
- A complete copy of the database is required for testing or development purposes.

#### 3.1.2 Incremental Recovery

Incremental recovery involves restoring only the parts of the database that have changed since the last full or incremental backup. Incremental recovery is typically used in the following scenarios:

- Partial data loss or corruption has occurred in the database, requiring recovery of data up to a specific point in time.
- The database needs to be reverted to a particular time point for data analysis or trouble