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Considerations for creating an erasure coding topology

These considerations apply to creating an erasure coding topology:

  • Before you can create an erasure coding topology:
    • All the HCP systems to be included in the erasure coding topology must be at release 8.0 or later.
    • All the HCP systems to be included in the erasure coding topology must be available.
    • The underlying replication topology must already exist.
    • Each system in the underlying replication topology must be able to recognize each other system in the topology through a path of one or more active/active replication links. However, these links do not need to be the links you include in the erasure coding topology.
  • All replication links to be included in an erasure coding topology must be active/active.
  • You can create an erasure coding topology from any HCP system to be included in the topology. You cannot create an erasure coding topology from a system that will not be part of the topology.
  • You cannot create an erasure coding topology while any HCP systems to be included in the topology are being upgraded.
  • Each link to be included in an erasure coding topology can include any number of tenants, including none. Those tenants do not need to be included in the erasure coding topology.
  • The links to be included in an erasure coding topology can include different tenants from each other.
  • Two systems to be connected by a replication link in a new erasure coding topology can already be connected by a link in a retiring or retired topology. If this is the case, the new topology must include that link. You cannot use a different link to connect the two systems in the new topology.

 

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