* Evan Daniel <eva...@gmail.com> [2009-02-27 10:58:19]: > On Thu, Feb 26, 2009 at 4:19 PM, Matthew Toseland > <t...@amphibian.dyndns.org> wrote: > > > - Possibly increase the number of nodes faster nodes can connect to. > [...] > > TOP FIVE USERVOICE SUGGESTIONS: > > 1. Release the 20 nodes barrier. > > This is marked as "under review", it may happen in 0.9. It requires some > > alchemy/tweaking. :| > > Alternately (or in addition), you could decrease the node limit on > slow nodes. I've been running with a lower bandwidth limit lately > (15KiB/s out), and I see slightly improved payload fraction with a 15 > node limit than 20 -- about 71-72%, vs about 68% with 20KiB/s. > Bandwidth limiting still hits its target effectively (currently > showing 14.3KiB/s average on 18h uptime). Subjectively, I can't see a > difference running 20 vs 15 connections. > > As I understand it, the problem is that per-connection speed is > limited by the slowest connection (approximately). If slow nodes had > fewer connections, those connections would be faster, just as if the > faster node had more connections. So from a bandwidth usage > standpoint, the two approaches should be similar. > > I do see two advantages to not increasing the connection limit, > though. With a small network of only a few thousand nodes, the > diameter of the network is very small. Eventually, when Freenet has a > large network, routing needs to work over a larger diameter. If you > increase the connection limit now, you'll learn less about how Freenet > scales in practice in the near future. > > Since reducing the connection limit on low bw nodes seems to increase > the payload fraction, that means their bw is being used more > efficiently. My recollection is that reducing the connection limit > didn't change payload fraction at higher bw limits. Efficiency > improvements are nice even if they're small and only on some of the > network. > > I think it would be inappropriate to reduce the connection limit > without further testing. Has anyone else with a low bw limit tried > this? Does it cause any problems? If it doesn't cause any problems, > I would suggest making the change be a small one initially. Rather > than a flat 20 connections, something like 1 connection per 2KiB/s of > outbound bandwidth, with a minimum of 15 and a max of 20. I'll > perform some testing with 15 connections, 30KiB/s limit and report > back on that. >
Tweaking that code based on one's experience is just plain silly.
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