Matt McCutchen wrote: > > Does anyone have any experience with 'syncdat' from Data > >Expedition? How does it compare to rsync? > > I looked at the syncdat feature list ( > http://www.dataexpedition.com/syncdat/features.html ). Aside from the > claim of much better performance, syncdat appears to be equivalent to > a combination of rsync, unison, and ssh. Mike, am I missing something > that syncdat can do but rsync and unison can't? And is more > information available about the benchmark that found that syncdat is > "Up to ten times faster than rsync" ( > http://www.dataexpedition.com/syncdat/ )?
I looked at their web site, and they're claiming that their patented MTP/IP protocol is so much superior to TCP/IP over wide area networks that it makes data transfer faster - due to handling congestion better. If you're transferring over a LAN, or uncongested network, it offers no advantage. I read their patent; it's written in impenetrable bullshitese, and seems to resemble a sort of transaction-oriented TCP SACK. If I had to trial their program, I'd compare with HTTP, FTP or rsync/similar over a modern TCP or SCTP implementation with a few of the esoteric TCP congestion control modules in 2.6 Linux, and ensure I wasn't CPU bound. Their FAQ indicates that their program does not compress automatically, and I saw no indication of a delta-transmission protocol equivalent to the rsync algorithm. They have a product which tunnels any TCP/IP stream over their MTP/IP. I'm guessing running rsync over that would give the same gains as using their file transfer utility, assuming there are gains, and the added benefit of rsync delta-transmission. -- Jamie -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
