# A Unified Vendor-Agnostic Solution for Big Data Stream Processing in a Multi-Cloud Environment
## 4 MC-BDP Prototype Evaluation
### Experimental Results
#### 4.1.3 Average Container Memory Utilisation
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{Scalability Metrics} & \\ \hline Velocity & \multicolumn{3}{c}{Three Workers (n = 3)} & \multicolumn{3}{c}{Six Workers (n = 6)} & \multicolumn{3}{c}{Mann–Whitney U Test Results} \\ \hline  & Single & Multi & Single & Multi & Three Workers and Three Workers (Single & & \\  & Single & Multi & Single & Multi & & and Multi) \\ \hline
1 min & 824 & 865 & 790 & 812 & \(p\)-value = 0.2000, accept Ho \\ \hline
1 sec & 955 & 976 & 933 & 1015 & Three Workers and Six Workers ([S,S] x [M,M]) \\ \hline
100 ms & 957 & 995 & 941 & 992 & \(p\)-value = 0.4217, accept Ho (S,S) \\  & & & & & \(p\)-value = 0.1905, accept Ho (S,M) \\ \hline
10 ms & 968 & 1002 & 942 & 998 & \(p\)-value = 0.5556, accept Ho (M,M) \\ \hline
1 ms & NA & NA & 964 & 1058 & Six Workers and Six Workers (Single and Multi) \\ \hline Average & 926.00 & 959.50 & 901.50 & 954.25 & \(p\)-value = 0.09524, accept Ho \\ \hline \hline \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline Velocity & \multicolumn{3}{c}{Three Workers (n = 3)} & \multicolumn{3}{c}{Six Workers (n = 6)} & \multicolumn{3}{c}{Mann–Whitney U Test Results} \\ \hline  & Single & Multi & Single & Multi & Three Workers and Three Workers (Single & \\  & Single & Multi & Single & Multi & and Multi) \\ \hline Average & 1 min & 837 & 758 & 882 & 684 & \(p\)-value = 0.6857, accept Ho \\ \hline
1 sec & 839 & 842 & 717 & 758 & Three Workers and Six Workers ([S,S] x [M,M]) \\ \hline
100 ms & 833 & 829 & 879 & 776 & \(p\)-value = 0.2000, accept Ho (S,S) \\  & & & & & & \(p\)-value = 0.05714, accept Ho (S,M) \\  & & & & & & \(p\)-value = 0.3429, accept Ho (M,S) \\ \hline
10 ms & 699 & 849 & 897 & 904 & \(p\)-value =0.0294, accept Ho (M,M) \\ \hline
1 ms & NA & NA & NA & NA & Six Workers and Six Workers (Single and Multi) \\ \hline Average & 802.00 & 819.50 & 843.75 & 780.50 & \(p\)-value = 0.5614, accept Ho \\ \hline \hline \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\ \hline Velocity & \multicolumn{3}{c}{Three Workers (n = 3)} & \multicolumn{3}{c}{Six Workers (n = 6)} & \multicolumn{3}{c}{Mann–Whitney U Test Results} \\ \hline  & Beam & Flink & Beam & Flink & Beam & Flink \\ \hline  & S & M & S & M & S & M & Three Workers and Three Workers (Single & \\  & Single & Multi & Single & Multi & and Multi) \\ \hline
1 min & 869 & 861 & 914 & 911 & 783 & 764 & 880 & 876 & \(p\)-value = 1.0000, \\  & & & & & & & & accept Ho  accept Ho  accept Ho  accept Ho  accept Ho \\ \hline
1 sec & 965 & 971 & 894 & 927 & 941 & 949 & 929 & 903 & Three Workers and Six Workers ([S,S] x [M,M]) \\ \hline
100 ms & 957 & 978 & 926 & 909 & 931 & 913 & 926 & 912 & \(p\)-value = 0.09524, \\  & & & & & & & & \(p\)-value = 0. Results (in the form of graphs and regression models) for the average memory utilisation by velocity, windowing rate, and cluster are tabulated in Table 14.