Alexey Eremenko wrote: > hi all ! > > Few days ago I was at Cisco Expo 2007 in Israel, and came across truly > revolutionary technology demo: WAAS. > This technology is able to locally intercept and ack TCP-sessions as > well as do application-layer-specific optimizations, and the > performance win was HUGE - something like 10x-20x fold win ! ! ! > > http://www.cisco.com/en/US/docs/app_ntwk_services/waas/waas/v401/configuration/guide/intro.html#wp1055743 > > http://www.cisco.com/en/US/products/ps6870/index.html > > This results in downloading multi-megabyte files over the Internet in > just few seconds ! (instead of minutes). I was totally shocked when I > saw this in action. > > Unfortunately, Cisco and their pricing are out-of-reach for home users. > > Is there anything Open-Source on Linux that have similar functionality ? > I didn't see any claims in there about improving file transfers, only about combining techniques to improve efficiency. One thing you have to bear in mind is that any channel has some fixed bandwidth limit, which cannot be exceeded. You can apply various tricks, such as compression etc., to improve data through put, but sooner or later you're going to hit that bandwidth limit. So, if you took data, with a lot of redundancy, you could compress it to a small fraction of it's size, transmit it and then uncompress at far end. This would give the appearance of having transmitted far more data, but in fact, you've only reduced the amout of data that had to be transmitted. This is a common, everyday function in modems, cell phones, image files and many, many other examples. Back in the dialup modem days, a common technique was Van Jacobson compression, where the headers were reduced, be elimiating redundant data. So, no you will not be able to download a huge file, in a short time, unless it has a lot of redundant info.
-- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
