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System Lab
R6
Cascading failures
One server dies, its load lands on the others, and they die too.
System Lab
R
R1
R2
R3
R4
R5
R6
R7
R8
R6
Cascading failures
Key
What the dots mean
The problem
1 s on screen = 100 ms
Users
270 req/s
Balancer
checking health
Server 1
0/4 busy
Server 2
0/4 busy
Server 3
0/4 busy
Server 4
0/4 busy
Users
Balancer
Server 1
Server 2
Server 3
Server 4
Answered
Dominoes:
—
Headroom:
—
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