While keeping excessive snapshots can impact storage efficiency, deleting them in bulk to reclaim space may also affect performance. It's recommended to manage snapshots by deleting them on a regular basis
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)