TrueNAS Early Release Documentation
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Advanced Replication Tasks
2 minute read.
TrueNAS advanced replication allows users to create one-time or regularly scheduled snapshots of data stored in pools, datasets, or zvols on their TrueNAS system as a way to back up stored data. When properly configured and scheduled, local or remote replication using the Advanced Replication Creation option takes regular snapshots of storage pools or datasets and saves them in the destination location on the same or another system.
Replication from one pool or dataset to another pool or dataset on the TrueNAS system is called local replication. Replication from the TrueNAS system to another TrueNAS or other backup server is called remote replication. Both local and remote replication can involve encrypted pools or datasets.
The Advanced Replication Creation option opens the Add Replication Task screen. This screen provides access to the same settings found in the replication wizard, but has more options to specify:
- Full file system replication
- Stream compression
- Replication speed
- Attempts to replicate data before the task fails
- Block size for data sent
- Log level verbosity
You can also:
- Change encrypted replication to allow an unencrypted dataset as the destination
- Create replication from scratch
- Include or exclude replication properties
- Replicate specific snapshots that match a defined creation time.
- Prevent the snapshot retention policy from removing source system snapshots that failed
With the implementation of the local administrator user to replace the root login, setting up replication tasks as an admin user differs from setting up replication tasks when logged in as root. Setting up remote replication while logged in as the admin user requires selecting Use Sudo For ZFS Commands.
The first snapshot taken for a task creates a full file system snapshot, and all subsequent snapshots taken for that task are incremental to capture differences occurring between the full and subsequent incremental snapshots.
Scheduling options allow users to run replication tasks daily, weekly, monthly, or on a custom schedule. Users also have the option to run a scheduled job on demand.