Snapshot Replication
DSM Version
Snapshot Replication
Features
- Schedulable and near-instantaneous data protection
- Supports various replication topologies for different scenarios, including active-active, extended replication, one-to-many and hub-to-spoke
- Fast data recovery on the disaster recovery site
- Supports snapshot features for shared folders in Btrfs volume and LUNs, including schedule, management, browse, recovery
- Supports snapshot preview and file copy in File Station
- Supports snapshot preview, file copy, and recovery in Windows File Explorer
Specifications
- Customizable snapshot and replication schedules
- Snapshot can be taken every 5 minutes
- A replication task for a shared folder can be executed every 5 minutes
- A replication task for a LUN can be executed every 15 minutes
- Maximum number of snapshots per system:
- Memory exceeding or equivalent to 2 GB (factory-installed): 65,536
- Others: 4,096
- Maximum number of snapshots per shared folder:
- Memory exceeding or equivalent to 2 GB (factory-installed): 1,024
- Others: 256
- Maximum number of snapshots per LUN: 256
- Maximum number of replication tasks
- FS, HD, SA, UC, XS/XS+ series
- 64 tasks per system (for both shared folders and LUNs in total)
- 64 tasks for shared folders
- 32 tasks for LUNs
- Plus, DVA series
- 32 tasks per system (for both shared folders and LUNs in total)
- 32 tasks for shared folders
- 16 tasks for LUNs
- Others
- 16 tasks per system (for both shared folders and LUNs in total)
- 16 tasks for shared folders
- 8 tasks for LUNs
- Customizable retention rules for different snapshot management demands
- Numbers of latest snapshot to keep
- Keep all snapshots for
- Advanced retention policy
- Snapshot size calculation for space management
- Online preview of snapshot content and downloading single file in snapshots
- Supports importing the initial replication data to the destination server with an external storage device to reduce the replication time
- Customizable IP address and port of a replication task
- Replication transmission encryption
- Customizable number of concurrent tasks for better system resource allocation
- Restoration of files and folders by using Windows Previous Versions
- Verification tests on site recovery
Limitations
- Only shared folder snapshots support:
- Online preview of snapshot content
- File and folder restoration using Windows Previous Versions
- Calculation of snapshot size for space management
- Snapshots cannot be taken if there is less than 100 MB of available space on the volume
- NFS permission cannot be recorded in snapshots
- Data in the recycle bin are recorded in snapshots
- Encrypted shared folders do not support online preview of snapshot content
- Each one-to-many/extended replication supports three different sites as destination sites at most
- The number of concurrent tasks is only configurable on models with more than 2 CPU threads (Learn more about each model's CPU threads)