Writing large models?

[Steve Vestal]

I'm having trouble writing a large Model (36293418 statements) into a 
file with a given syntax (e.g., TTL, RDF/XML).  I'd appreciate ideas.

Model, RDFDataMgr, and RDFWriter use OutputStream and StringWriter.  
With the exception (I assume) of PipedOutputStream, they all seem to 
buffer the data in a byte array or String when converting Model content 
to a text file format.  The maximum length of a Java String or array is 
the 32 bit int type, 2,147,483,647 bytes. I get the exception 
"java.lang.OutOfMemoryError: Required array length 2147483639 + 9 is too 
large".  Is there a way to feed chunks of data from a Model into a 
PipedOutputStream, where the PipedInputStream provides the model content 
in a selected text syntax?  Is there a simple way to split a Model into 
smaller Models, write those as text files, and merge those files back 
together?