# Replication-based Backups

__*Replication-based backups*__

+ The TiDB database supports replication, with one server acting as the primary server and one or more other servers acting as slaves
+ TiDB database replication can be used for backup
+ This eliminates the impact on production applications
+ The backup of the slave is logical or original
+ Higher costs
+ Based on asynchronous replication
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The TiDB database supports replication, with one server acting as the primary server and one or more other servers acting as slaves.

TiDB database replication can be used for backup:
  The master library is used for production applications.
  The library is used for backup.

This eliminates the impact on production applications.

The backup of the slave is logical or original.

Higher cost: You must have another server and storage to store a replica of the database.

Based on asynchronous replication:
  Slaves may be delayed relative to the host.