Single DFS or alternative architectures for performance?

[Murat Ali Bayir]

Hi everybody,
Does a system with one DFS (crawl, parse, index, and search etc. all on 
1 DFS)
have performance problems at search part? What if 2 DFS were used? One for
search part (getting summary etc.) and the other one is for the other 
nutch operations
(fetch, parse, index etc.). Or is there any alternative architectures 
for systems performing
all the nutch functions concurrently on one DFS?