We value your privacy

We use cookies to personalize your use of our site. This includes third-party cookies for that we use for advertising and site analytics. See our Privacy Statement and Cookie Policy for more information on how we collect and use data.

Cookie Options
OK
Knowledge Center

Snapshot Replication

Snapshot Replication is an expert of data backup and recovery. Businesses need data protection to prevent data loss from accidental deletion, application crashes, data corruption, and viruses.

Note:

  • The "snapshot" feature is a point-in-time copy stored in the same volume used to record the whole data status at the time upon being taken. Snapshots use only a small amount of additional storage space, and do not have a performance impact.
    With the snapshots, if a user accidentally modifies or deletes data on a volume with snapshots, you are able to quickly restore the data back to the previous time at which the snapshot was taken. In addition, it allows users to recover their own deleted or modified files in shared folders without assistance from the administrator.
  • The "replication" feature is a mechanism to sync the taken snapshots of shared folders or LUNs between the sources and destinations. If the replication source fails to run normal service, you can perform a failover and protect your data with the replicated snapshots.

Snapshot Replication helps you manage and monitor the snapshots and replication tasks on your Synology NAS.

Depending on the functions supported by your Synology NAS, Snapshot Replication helps you accomplish the following tasks:

  • Take and manage snapshots of shared folders and LUNs.
  • Take immutable snapshots of shared folders and LUNs that cannot be deleted via any method.
  • Configure scheduled snapshots and retention settings. These settings will determine when and how the snapshots should be taken, retained, and/or removed.
  • Create and manage replication tasks for shared folders and LUNs.
  • Configure scheduled replication to periodically run the syncing for your replication tasks.
  • Restore data from snapshots, and perform failover/switchover of replication tasks between the source and destination.
  • View the logs of the events related to snapshots and replications.

Note:

  • The snapshot and replication features are available for the following targets only:
    • Shared folders located in volumes using the Btrfs file system
    • LUNs created as Standard LUNs with storage acceleration or Advanced LUNs
  • Snapshot Replication has defined the limits of the following maximum numbers of retainable snapshots:
    • 1024 snapshots for each shared folder (or 256 on certain Synology NAS models)
    • 256 snapshots for each LUN
    • 65536 snapshots in total in the system (or 4096 on certain Synology NAS models)
    For more information on the maximum snapshot number, please refer to the specifications of your purchased Synology NAS models.
  • Refer to the Synology NAS models that support WriteOnce.
  • To improve replication performance, you can go to Storage Manager > Storage > Volume > Settings to select a Btrfs volume containing replicated targets, and set Record File Access Time Frequency to Monthly or Never in the Edit window.