March 2013 Dell EqualLogic Configuration Guide v14.1 6-43
• PS Series groups can have up to 16 replication partners and can support a maximum of 10,000
total snapshots and replicas from all of its replication partners.
• A group can have volumes replicating with multiple partners, but an individual volume can
have only one replication partner.
• A maximum of 256 volumes per group can be configured for active replication.
• All volumes that are part of a volume collection can only replicate with a single partner.
• A volume can have up to a maximum of 512 replicas stored on a partner group.
o For a PS4000 only group, you cannot exceed two replication partners and 32 volumes
configured for replication
6.1.2 Replication paths
The example replication paths shown in Figure 12 are described below.
• Basic partnership: one partner group hosts the primary copy of the volume and a second
partner group hosts the replica copy of the same volume. We also show the reverse direction
of the path for the Fast Failback replication feature, if it is enabled for the replica set.
• Single to multiple group partnership: a single group can support replication of multiple
primary volumes to different secondary replication partner groups.
• Reciprocal partnership: you can create bi-directional replication paths between partner
groups
• Multiple to single group partnership: a common scenario in which multiple primary groups
replicate their volumes to a single secondary group partner in a different location.
Figure 12 Replication partnership paths
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