ABS supports recognizing the following two access modes:
Snapshot templating
When a snapshot is cloned multiple times (by default, more than 10 times), it is treated as a template. The data associated with this snapshot is distributed uniformly across the cluster, with no consideration for localization and locality objectives.
Pooled access
When multiple access points access a volume simultaneously, the system treats the volume as a virtual storage pool and does not migrate data based on the access points.
In addition, dynamic data migration is accomplished based on the perception of the access points. When the access point of an active volume changes (for example, during virtual machine migration), the ABS access service reports this change to Meta. In the subsequent rebalancing policy, Meta gradually conducts data migration to new access points to achieve the data locality objective.
