Help Center> Document Database Service> User Guide> Data Restorations> Restoring Data to an On-Premises Database> Restoring a Cluster Backup to an On-premises Database> Overview
Updated on 2023-05-23 GMT+08:00
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Overview

This section uses the Linux operating system as an example to describe how to restore the downloaded backup file of a cluster to your on-premises database. For details about how to download backup files, see Downloading Backup Files.

Precautions

  • This method applies only to cluster instances.
  • Only DDS 3.4 and 4.0 instances can be restored in this method. DDS 4.2 does not support this method.
  • The directories, IP addresses, and ports provided in the example are for reference only. Configure these items based on your service requirements.
  • There is one backup file of the configsvr node and multiple backup files of the shardsrv node. The number of backup files depends on the number of shardsvr nodes.
  • After the backup file is downloaded, decompress the file using LZ4. Command for reference: lz4 -d $1 | tar -xC $2

    $1: indicates the downloaded backup file.

    $2: indicates the directory to which the backup file is decompressed.

  • For details about how to migrate data at the database or collection level, see Migrating Data Using mongodump and mongorestore.

Prerequisites

MongoDB client 3.4 or 4.0 has been installed on your on-premises database.