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Dell Storage Manager 2020 R1 Administrator's Guide

One-to-Many and Cascaded Replications

FluidFS replication supports one-to-many and cascaded replications.

This feature creates more complicated replication formations. For example, this feature supports:

  • Multiple disaster recoveries for the same NAS volume
  • Distribution of the same data to multiple destinations around the world
  • Cascading the data from the production cluster to another cluster and replicating from this cluster to reduce the load on the production cluster

One-to-Many

One-to-many replication connects a source NAS volume to multiple destination NAS volumes. A NAS volume can be connected as the source NAS volume in more than one replication pair at the same time. The destination NAS volumes can be on different clusters. One-to-many replications are independent and can be run in parallel.

Limitation

When using one-to-many replication, the destination NAS volume can consume more space than the source NAS volume because it has more snapshots.

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 different replication is not a cascaded replication.


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