There is no requirement to use the two components of DFS together; it is perfectly possible to use the logical namespace component without using DFS file replication, and it is perfectly possible to use file replication between servers without combining them into one namespace.
In 2016, the majority (51%) of the 8.4 million barrels per day (b/d) of crude oil produced in the Lower 48 states was light oil, or less dense oil with an API gravity of 40.1 or above. Light oil also made up more than half of the oil produced in 2015. API gravity is measured as the inverse of the density of a petroleum liquid relative to water. The higher the API gravity, the lower the density of the petroleum liquid, so light oils have high API gravities.
1 West Texas Intermediate (WTI) Oil, aka Texas Sweet Light, is a type of crude oil used as a benchmark in oil pricing and the underlying commodity of New York Mercantile Exchange's oil futures contracts. 2  WTI and Brent Crude are usually referenced in Western news reports about oil prices.3  WTI is lighter than Brent Crude. It is commonly used for processing into gasoline. 2  Brent Crude consists of Brent Crude, Brent Sweet Light Crude, Oseberg, and Forties. 3  Brent Crude is sourced from the North Sea. 4  The name 'Brent' comes from the formation layers-Broom, Rannoch, Etieve, Ness and Tarbat.