D2R MAP Processor

Hello,
we like the idea of using D2R to construct triple store from our
relational database. The problem that we need
to deal with billions of triples. The in-memory construction of whole
database is not a visible option.
Is it possible to make D2R Map Processor use chunking ?(
for example in case with with mysql -- sql stmt with limit 1,10000) and
write to file triples by portions.
Thank you,
Luda Balakireva, LANL
ludab@lanl.gov