Indexing documents with mkvdk
http://www.stanford.edu/class/cs347/project/vdkdocs/coll/02_cbg2.htm#915094
% mkvdk -collection foo -insert docpath [docpath2 …]
% mkvdk -collection foo -insert @listfile
- listfile contains names of docs, 1 per line
% mkvdk -collection foo -bulk -insert bulkfile