The following terms will be used repeatedly in this document that have been introduced for ActiveCluster:
- Pod—a pod is a namespace and a consistency group. Synchronous replication can be activated on a pod, which makes all volumes in that pod present on both FlashArrays in the pod.
- Stretching—stretching a pod is the act of adding a second FlashArray to a pod. When stretched to another array, the volume data will begin to synchronize, and when complete all volumes in the pod will be available on both FlashArrays.
- Unstretching—unstretching a pod is the act of removing a FlashArray from a pod. This can be done from either FlashArray. When removed, the volumes and the pod itself are no longer available on the FlashArray that was removed.
- Restretching— When a pod is unstretched, the other array (the array unstretched from) will keep a copy of the pod in pending eradication for 24 hours; this would allow the pod to be quickly re-stretched without having to resend all the data if restretched prior to the eradication completing in 24 hours.