Incremental backup is a type of backup strategy that only backs up data that has changed since the last full or incremental backup. This can reduce backup time and storage space, and improve backup efficiency. Here are some general methods on how to perform incremental backups of server data:

　　1. Full backup:

　　First, perform a full backup to back up the entire system's data to an initial backup storage location.

　　2. Incremental backup:

　　Subsequent backups will back up only the data that has changed since the last backup based on the time point of the last backup. The following is the general process for incremental backup:

　　a. The first step of incremental backup:

　　Perform the first incremental backup, backing up all changes since the last full backup.

　　b. Subsequent incremental backup:

　　In each subsequent backup cycle, only new or modified files and data since the last backup (possibly the last incremental backup) are backed up.

　　3. Backup tools:

　　Use appropriate backup tools, such as rsync, tar, or professional backup software. These tools usually provide the option of incremental backups.

　　4. Record backup status:

　　Record the status information of the backup during backup so that the data can be accurately restored during recovery.

　　5. Regular full backup:

　　Perform full backups regularly to ensure the integrity of the backup chain. This prevents incomplete data due to interruptions in the incremental backup chain.

　　6. Backup cycle:

　　The backup cycle is determined based on business needs and frequency of data changes. Incremental backups can be performed daily, weekly, or monthly.

　　7. Storage strategy:

　　Incremental backups generally require more storage space because each incremental backup builds on the previous one. Therefore, storage space requirements should be fully considered.

　　8. Monitor and verify backups:

　　Regularly monitor the running status of the backup to ensure that the backup task is successfully completed. The availability of backups can also be verified through recovery testing.

　　9. Recovery test:

　　Regularly conduct recovery tests to ensure that data can be successfully restored when needed.

　　In actual operation, choose appropriate backup strategies and tools, and design incremental backup plans based on business needs and the frequency of data changes. Incremental backups are a cost-effective way to back up, but the backup chain needs to be carefully managed to ensure data integrity.