byte getId() {
    return id;
  }
A Datacenter in an Ambry cluster. A Datacenter must be uniquely identifiable by its name. A Datacenter is the primary
unit at which Ambry hardware is organized (see {@link HardwareLayout})). A Datacenter has zero or more {@link
DataNode}s.

This class is meant to be used within the {@link StaticClusterManager}.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/Datacenter.java