...
Akraino sites hierarchy consists of Central sites that deploy Regional sites and Regional sites that deploy Edge sites. The figure below shows Central site C1 deploying Regional sites R1, R2, R3, and R4 and Central site C2 deploying Regional sites R5, R6, R7, and R8. Regional site R1 deploys Edge sites E11, E12 and other sites in the R1 "Edge Flock". Regional site R2 deploys edge sites E21, E22 and other sites in the R2 "Edge Flock" and so on.
Regional sites serve as the controller for Edge sites in their corresponding "Edge Flock". For instance, R1 is the Regional Controller for Edge sites E11, E12, and others. R1 is responsible for Day 0 site deployment and Day 1/Day2 site operations and lifecycle management of E11, E12 and other sites in the "R1 Edge Flock". Similarly, R2 is the Regional Controller for Edge sites E21, E22, and others. R2 is responsible for Day 0 site deployment and Day1/Day 2 site operations and lifecycle management of E21, E22 and other sites in the "R2 Edge Flock" and so on.
...