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Replicated entity limitations

Asynchronous replication supports replicating:

  • volumes
  • consistency groups
  • filesystems

Synchronous replication supports replicating:

  • volumes
  • consistency groups

Active-Active replication supports replicating:

  • volumes

Replicated entities limitations

  • Only root volumes/filesystems can be replicated
  • An entity can be replicated only to one target
  • A replicated entity cannot be restored or deleted
  • A target entity cannot be write-enabled
  • No more than 6-15 replicas can be initialized at the same time (depending on the Infinibox model)
  • The maximum number of replicas in InfiniBox is (the lower between the two):
    • 250 replica definitions (Consistency groups, volumes, and filesystems)
    • 2048 datasets (volumes or filesystems)

Network space limitations

  • IP addresses cannot be added or removed from a replication network space when a link is attached

System limitations

  • A system supports up to 16 links to other systems
  • Two systems can have only one link between them

Replication management IP failure and re-establishment

In the case when all the interfaces in the port group containing the replication management IP link fail on the system master node, the data connections within the port group failover to the other nodes

  • The replication management IP, however, does not failover 
  • The system generate an event regarding the degraded state of the link 
  • During this time, although existing replicas keep working as usual, the replica state may not be reported correctly and replication provisioning operations cannot be performed until the replication port group is re-established
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