That is because the computing power of the small instance is weaker than other instances.
Standard (per instance hour consumed) €0.085 for small instances €0.34 for large instances €0.68 for x-large instances.
The proposed model is solved to optimality for small instances and is used to obtain lower bounds for larger instances.
The exact method found the optimal solution of all small instances and of 26% of medium instances.
But, Digital Ocean has the lowest price for small instances.
This relationship is reversed when considering small instances, though.
Fig. 32 Value figure for small instances Fig. 33 Value figure for medium instances Fig. 34 Value figure for large instances Fig. 35 Value figure for xlarge instances.
Fig. 40 Performance score for small instances Fig. 41 Performance score for medium instances Fig. 42 Performance score for large instances Fig. 43 Performance score for xlarge instances .
The results are presented based on the VMs sizes: Small instances (Fig. 36), Medium instances (Fig. 37), Large instances (Fig. 38), and Xlarge instances (Fig. 39).
Hence, only small instances can be optimally solved in an acceptable computing time.
