and a copy for devl@ >> don't over-specialize freenet, the disjunction file<->splitfile is ugly >> enough [[[entropy's approach is imho better]]] > >Hey, do you mind posting a description of what entropy does differently. I >have so far been unable to find ANYTHING in their docs that seems to >distinguish them from Freenet.
entropy splits up every file into 4k blocks and uses an algorithm comparable to freenet's fec to create additional redundant blocks (fixed 50% redundancy IIRC). then all those 4k blocks and checkblocks are inserted into the net, just like we do in freenet. the difference is that every file >4k is fec-ed and thus small files, such as html-pages and graphics are downloadable in parallel by requesting different blocks and that those smaller files are more protected from falling of the net due redundant blocks and reconstruction. it uses a fixed block size of 4k, which may be too small to be effective, but the main advantage is, that ALL blocks are 4k and thus are easier to handle and the meta-algorithms such as routing and timeouts are more prdictive than using the various block sizes from freenet also i think their fec-algorithm (which experienced a rewrite some time ago) is faster than the one used by freenet. entropy is coded in C(pp?) and so it might be able to reuse their fec-code for freenet by reimplementing it with java and/or compiling it to native for various platforms for additional speedup. (freenet's fec also seems to be somewhat buggy, limited (128MB segments for files too lange) and not always threadsafe?) unfortumately entropy is merely a single-person project, so the algorithms used are not tested very well and might also be proprietary. entropy's board can be found at "http://f27.parsimony.net/forum66166/index.htm"; please read the author's original documentation, because everything i wrote here is from memory only! HTH _______________________________________________ devl mailing list [EMAIL PROTECTED] http://hawk.freenetproject.org:8080/cgi-bin/mailman/listinfo/devl
