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10
6
1 slave
2 slaves
3 slaves
4 slaves
10
5
10
4
10
3
10
2
10
1
10
0
50
75
100
125
150
175
200
Number of concurrent users
(a)
10
6
1 slave
2 slaves
3 slaves
4 slaves
10
5
10
4
10
3
10
2
10
1
10
0
50
75
100
125
150
175
200
Number of concurrent users
(b)
10
6
1 slave
2 slaves
3 slaves
4 slaves
10
5
10
4
10
3
10
2
10
1
10
0
50
75
100
125
150
175
200
Number of concurrent users
(c)
FIGURE 11.6
Average relative replication delay of the workload with the read/write ratio is
50/50. (a) Same zone (
us
-
west
-1
a
). (b) Different zone (
us
-
west
-1
b
). (c) Different region (
eu
-
west
-1
a
).
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