“…Table 9 reports on the classification of the relevant research efforts according to the sub-domain. [24], [66], [137] Nodes reconfiguration [7], [19], [30], [57], [62], [64], [68], [69], [74], [77], [85], [104], [131], [133], [152] Resources Scaling [4], [33], [35], [36], [53], [58], [89], [90], [116], [122], [129], [134], [135], [140], [148], [153] Load balancing [10], [25], [51], [76], [96], [97], [98], [99], [141] Caching [1], [45], [46], [47], [86], …”