Administrator Guide

Cascaded
A NAS volume that is the destination of one replication can serve as the source NAS volume for another replication. The replication data
can be cascaded from a NAS volume to a second NAS volume and from it to a third NAS volume and so on. Multiple NAS volumes that are
connected in a cascaded replication can also include one-to-many replications.
Limitation
When using cascaded replication for replications that are not alike, a replication can be limited when the dierent replication is not a
cascaded replication.
Display One-to-Many and Cascaded Replications
About this task
A NAS administrator can determine that one-to-many and cascaded replications is congured by noticing the following change for a
volumes:
• The same NAS volume is in the replication source list and replication destination list
• NAS volume status has a new possible status: source and destination
• A table of both replications and status for each replication instead of only one or the other
Steps
1 In the Storage view, select a FluidFS cluster.
2 Click the File System tab.
3 In the File System view, expandReplications and then select a cluster.
The right pane displays the NAS volumes that are dened as the source and destination of the replication.
Add Replication for a NAS Volume
Adding replication creates a replication relationship between a source NAS volume and a target NAS volume. After adding replication, you
can set up a replication policy to run according to a set schedule or on demand.
1 In the Storage view, select a FluidFS cluster.
2 Click the File System tab.
3 In the File System view, expand NAS Volumes and select a NAS volume.
4 Click Create Replication. The Create Replication wizard starts.
If Inline Data Reduction for Replication Optimization is enabled, NAS volume replication will try to optimize network utilization by
reducing the amount of data copied. Dell recommends either Conditional Compression or Deduplication and Conditional
Compression as the inline data reduction method because it dynamically enables compression for in-ight data based on system
utilization. This option is completely independent of normal FluidFS data reduction (dedupe and compression). Data that is already
reduced is rehydrated and then reduced in-ight on its way to the remote destination.
5 Select a remoteFluidFS cluster, a policy from Snapshot Retention Policy at the destination, and a node from Limit Replication
Bandwidth According to QoS node (if enabled), and then click Next.
The Select Remote NAS Volume page opens.
6 Specify a target NAS volume using one of the following options:
• Select an existing NAS volume on the target FluidFS cluster.
• Create a NAS volume on the target FluidFS cluster.
Click Create Remote Volume. The Create NAS Volume dialog box opens. In the Name eld, type a name for the NAS volume. In
the Size eld, type a size for the NAS volume that is the same size or larger than the source NAS volume. In the Folder eld,
select a parent folder for the NAS volume. Click OK to close the dialog box, then select the newly created NAS volume.
7 Click Finish.
FluidFS Administration
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