Release Notes for Snapshot Replication

Fixed issues

1. Fixed an issue where replication tasks could not execute if their previous tasks failed.
2. Minor bug fixes.

What's New

1. Users can now customize when to transfer snapshots to the destination server to reduce the performance impact of replication tasks.
2. Added support for replicating local scheduled snapshots to the destination server along with replication tasks. (Requires DSM 6.2.3.)

Fixed Issues

1. Fixed an issue where replicating shared folder snapshots to a local volume might fail.
2. Minor bug fixes.

1. Fixed an issue where upgrading to 7.1.0-0445 may cause replication plans which had been created in 6.1.2-0173 or earlier versions to fail.

What's new

1. Added support for retention policy trigger time (available on DSM 6.2.2 or above).
2. Added support for two-step verification for replication tasks.
3. Added support for local replication tasks for iSCSI LUN.

Fixed issues

1. Fixed an issue where taking snapshots may fail when other applications take snapshots at the same time with the same snapshot file name.
2. Fixed an issue where calculating unsynchronized snapshot file size may fail.
3. Aligned display date and time formats with DSM.
4. Minor bug fixes.

What's New for DSM 6.2

1. Introduces Advanced LUN, a Btrfs-based LUN type that creates and restores snapshots in seconds.
2. Added the snapshot calculator to provide a graphical representation of storage consumption by snapshots in a given period of time.
3. Encrypted shared folders now support clone and test failover.

Updated the maximum number of replication tasks

XS/XS Plus series

• Maximum number of shared folder replication tasks: 64
• Maximum number of iSCSI LUN replication tasks: 32
• Maximum total number of replication tasks: 64

Plus series

• Maximum number of shared folder replication tasks: 32
• Maximum number of iSCSI LUN replication tasks: 16
• Maximum total number of replication tasks: 32

Value series

• Maximum number of shared folder replication tasks: 16
• Maximum number of iSCSI LUN replication tasks: 8
• Maximum total number of replication tasks: 16

Improvements & Fixed issues

1. Increased replication speed when the tasks involve transmitting a large number of small files.
2. Enhanced usability by adjusting setup procedure and troubleshooting messages.
3. Fixed an issue where snapshots could not be deleted when the volume was full.
4. Fixed an issue where local replication might fail after the destination shared folder was renamed.
5. Fixed an issue where the system might fail to run multiple replication tasks at the same time.
6. Thai user interface is now available.

Limitation

1. Starting from DSM 6.2, the core replication function is centrally managed by a new package, Replication Service. Packages with replication feature, such as Snapshot Replication, must install Replication Service package.

1. Enhanced replication stability when multiple replication tasks are running at the same time.
2. Enhanced the connection between the source and remote servers when both are connected via VPN.
3. Fixed an issue where replication could not be resumed after an abnormal shutdown.
4. Fixed an issue where the replication progress was not accurate under certain circumstances.

1. Supports replicating "homes" shared folder to remote server.
2. Fixed an issue where replication could not be properly terminated.

1. Thanks to the extended coverage of Btrfs file system, more models will benefit from the advanced data protection of Snapshot Replication.
2. Better protection for encrypted shared folders. You can now replicate the taken snapshots of encrypted shared folders for a more complete protection.
3. In addition to a remote destination server, snapshots can now be replicated to a local volume, providing greater flexibility with more copies stored.
4. Pause/resume is now supported to save time and bandwidth when the connection quality is poor.