Dell DX6000 - Manual (Page 16)

16 DX Object Storage Platform Overview
Remote Cluster Configuration
When you deploy multiple DX Storage Clusters (for example multiple sites,
offsite backup, and so on), the DX Cluster Services Node provides the ability
to replicate data between DX Storage Clusters using the DX Content Router
software.
The DX Content Router provides two services:
• Publisher service
• Replicator service
Clusters are connected by one cluster's replicator service to another cluster's
publisher service. This link can either be one-way (for offsite backup) or
two-way (for mirrored configurations).
Each publisher can support a number of replicators with a specific set of
replication rules. The publisher does not provide same set of data objects to
each replicator.
For redundancy, more than one DX Cluster Services Node may be present in a
cluster, but only one DX Cluster Services Node can be active as a publisher at
any time.
NOTE: There can be multiple publishers per cluster, but only the active (or primary)
Cluster Services Node can be the active subscriber.
Clusters may be connected by any type of link that can handle the desired
traffic volume. This link must be secured to prevent reading cluster data
being passed between clusters. See Figure 2-4.
Cluster data is passed directly between the two DX Cluster Services Nodes. It
is not recommended to have direct communication between storage nodes in
remote clusters.
For more information about multiple cluster configurations, see the Content
Router Setup and Configuration Guide at support.dell.com/manuals.
book.book Page 16 Monday, October 17, 2011 3:42 PM