Fatal server breaks and congestion in North and South
$-x-…
$-x-…
$-x-…
$-x-…
North
South
1
2
3
4
5
'90
'00
'10
'20
1.
1992
First unexpected malfunction observed
2.
1999
Malfunction occured, but did not impact many users
3.
2014
First large-impact server break
4.
2015
Personal data leak caused due to security breaks
5.
2019
First high-speed recovery applied to large-impact break