News Analysis: Some data centers, such as the massive facility of hosting and cloud company 1&1 Internet that I visited recently have huge emergency power generators. But what's a smaller company to do?
I visited the data center for
1&1 Internet, a huge hosting and cloud services provider
Lenexa, Kan., I was struck by the size of the emergency generating system. The
Caterpillar diesels that power the generators are the size of locomotive
four generator sets power the 40,000 servers in an N+1 configuration, and they
provide the power to operate the cooling and other building services necessary
to keep the data center alive when the power goes out. N+1 refers to a widely
used practice in IT to allow for at least one extra system or a set of systems
that will serve as a backup in case of failure.
all on a grand scale. The rows of server racks seem to go on forever,
networking equipment rooms line each side of the building. The main hallway of
the building seems to stretch into infinity. In short, 1&1's data center is
one big place.
not every company has or needs a data center the size of the Lenexa, Kan.,
facility owned by 1&1. In fact, even some fairly large companies have data
centers with less than 50,000 square feet or so. They don't need, and probably
can't afford, a massive emergency power system like the one that backs up
1&1. The problem for these companies with smaller needs is that diesel
generators frequently don't scale very well, especially when they need to be
run in parallel so that they can use an N+1 configuration.
the past, paralleling was done with switchgear," said Curt Gibson, Western
Power Solutions manager for Generac, a
manufacturer of emergency power systems
for a wide range of uses, including
data center power. Gibson explained that the switchgear for running big
generators in parallel was custom-built for each application. The problem has
always been that as the size of the required power unit decreased, the cost did
not decrease proportionally.
said that as power solutions come down in size, companies start feeling the
pain of those custom parallel solutions around the time they get to a
1,500-kilowatt power backup system. Michael Kirchner, technical support manager
for Generac, said this is the point where customers usually start looking at
single-engine designs for their emergency generators, simply because a parallel
solution is too expensive.
a single emergency generator is also a single point of failure for your data
center. If that one engine quits during an emergency, you're out of business.
But now there's a new option that lets smaller businesses have parallel
generating capacity, while keeping the cost competitive with single-engine