Martin wrote: [...] > OK, to guess some numbers... > > Uploads: > > s...@h has a 100Mb/s pinch point on their link; > > A typical UK (adsl) uplink is anything from 128kb/s up to 1Mb/s > depending on the connection. Most I guess will be 512kb/s or 768kb/s. > Add in a few dial-up 8kb/s, and then hope that there are no academic > links that can blast out a full 100Mb/s... > > That means that for a "guestimate", you don't want more than about 150 > to 200 simultaneous uploads. Note also that just one fast upload can > skittle the lot into link saturation. > > > Can the Boinc servers monitor the incoming uploads and simply defer or > deny new upload requests until the incoming data rate is seen to drop > below 80% of link capacity. > > *That has just got to be a simple fix* !
Note also that the same goes for *downloads* from the project servers. Taking the example of s...@h and typical speeds for the UK, that suggests that you do not want more than just *20* simultaneous downloads to avoid disgracefully saturating your link. And again, just one fast download can skittle everyone into lost data and multiple tcp retries. Defer new download requests until link utilisation is seen to be <80% oncemore? Regards, Martin -- ---------------- Martin Lomas [email protected] ---------------- _______________________________________________ boinc_dev mailing list [email protected] http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev To unsubscribe, visit the above URL and (near bottom of page) enter your email address.
