Dell EMC Metro node 7.1 Administrator Guide

Storage-at-clusters

Storage-at-clusters tells metro node at which cluster the physical storage associated with a consistency group is located.

The storage-at-clusters property of a consistency group must be a non-empty subset of the consistency group’s visibility property.

• If visibility is set to one cluster, then storage-at-clusters must be exactly the same as visibility.
• If visibility is set to two clusters (1 and 2), then storage-at-clusters can be one of:
  • cluster-1
  • cluster-2
  • cluster-1 and cluster-2

A volume that does not have local storage at every cluster specified by the storage-at-clusters property of a consistency group, cannot be added to the consistency group.

For example, if a volume has storage only at cluster-1, it cannot be added to a consistency group that has its storage-at-cluster property set to cluster-1 and cluster-2.

A volume that has local storage at more clusters than those specified by the storage-at-clusters property of a consistency group, cannot be added to the consistency group.

For example, if a volume has storage at cluster-1 and cluster-2, it cannot be added to a consistency group that has its storage-at-cluster property set to cluster-1.

The storage-at-clusters property cannot be modified if doing so conflicts with the topology of any of the volumes currently in the consistency group.

Use the set command in /clusters/cluster/consistency-groups/consistency-group context to modify the storage-at-clusters property. For example, to set the storage-at-clusters property to both clusters:

VPlexcli:/clusters/cluster-1/consistency-groups/TestCG> set storage-at-clusters cluster-1,cluster-2