Database Reference
In-Depth Information
1000
us-west-1
us-east-1
eu-west-1
eu-west-2
us-west-2
us-east-2
100
10
1
0.1
0.01
1E-3
1E-4
0
600
1200
1800
2400
3000
Timeline per slave (second)
Fig. 7.8
The performance of the replication delay for up to 6 replica servers with the framework
enabled, delay
tolerance
D
1;000 ms, and int
v
l
mon
D
240 s
1000
us-west-1
us-east-1
eu-west-1
us-west-2
us-east-2
eu-west-2
100
10
1
0.1
0.01
1E-3
1E-4
0
600
1200
1800
2400
3000
Timeline per slave (second)
Fig. 7.9
The performance of the replication delay for up to 6 replica servers with the framework
enabled, delay
tolerance
D
1;000 ms, and int
v
l
mon
D
480 s
and
eu-west-2
are added in sequence at the 255th, 407th, and 1,843th seconds,
where the drop lines are emphasized. The addition of the three replica servers are
caused by the SLA-violation of the virtualized database replica server in
us-west-
1
at different periods. In particular, there are four SLA-violation periods for the
replica server in
us-west-1
where the period must exceed the monitor interval, and
all calculated replication delays in the period must exceed the SLA of replication
delay. These four periods are: from 67 to 415 in total of 349 s, from 670 to 841 for
