I've seen the entire eastern seaboard of a top-3 U.S. bank taken out of service due to a single sidewalk collapse outside the bank's main data center, because parallel-running construction jobs went slightly out of sync. The interstate SONET ring in question was a two-carrier supported facility with segments supplied by both the local ILEC and one of its partnering IXC carriers. The sharing arrangement was conceived, ostensibly, in order to enhance reliability through increased redundancy of some key point solutions, including Network Management. Needless to say, the model remained a one-of-a-kind.
Agreed, in isolation the reference article is nonsense for anyone seeking root-cause detail. In aggregate, i.e., with other public sources, such as James Hamilton was able to unearth, a clearer picture, albeit not yet quite crystal clear, begins to emerge:
When You Can’t Afford Not to Have Power Redundancy | December 22, 2017
James Hamilton | Perspectives
Atlanta Hartsfield-Jackson International Airport suffered a massive power failure yesterday where the entire facility except for emergency lighting and safety equipment was down for nearly 11 hours. The popular press coverage on this power failure is extensive but here are two examples:
WSJ: wsj.com (pay wall)
For most years since 1998, Atlanta International Airport has been the world’s busiest airport. In 2012, 100 million passengers flew and 950,119 flights originated or terminated at the airport. That’s roughly 260,000 passengers per day. When Atlanta is down, more than a ¼ million passengers are stranded or less effective. Ignoring that, the entire $1.28 billion dollar facility doesn’t produce revenue. Every major passenger jet trapped by the outage and unable to fly, is worth more than $100m with an average cost per plane of $103.4 million for a 737, $387.2 million for a 747, $202.6 million for a 767, $344.2 million for a 777, and $270.9 million for a 787. The cost of a day’s financing on the aggregate number of planes unable to fly and the $1.28 billion dollar facility that is making its customers less productive rather than more is a big number and would fund a fairly substantial investment in power redundancy. Let’s look at what happened and what it would cost to avoid.