  The combination of edge and cloud in the fog computing paradigm enables a new
breed of data-intensive applications. These applications, however, have to face
a number of fog-specific challenges which developers have to repetitively
address for every single application.
  In this paper, we propose a replication service specifically tailored to the
needs of data-intensive fog applications that aims to ease or eliminate
challenges caused by the highly distributed and heterogeneous environment fog
applications operate in. Furthermore, we present our prototypical
proof-of-concept implementation FBase that we have made available as open
source.
