-
gserver not robust enough, very easy to break out(need to deal with all kinds of exceptions).
-
queries related with uncertain predicates are not supported.
-
only
select
queries can be used now. All aggregate queries are not supported, as well as insert/modify/remove operations. -
only support RDF datasets in N-Triples format
-
the cost of disk and memory is still very large
-
the VStree index consumes too much time and memory, and the filter effects are not good(less than 25%).