I'm curious whether my Non-Blocking network stack (BitDroid) isn't better suited for detecting and tracking available peers. I have implemented several benchmarks, including a simple peer counter listener, which would have to be adapted to fit the DNS needs (open and check if a real peer is listening). Being non-blocking it can open several hundreds of connections to check reachability of the peers and at the same time keep a pool of peers connected to listen for address broadcasts, with minimal overhead (single thread, close to no context switches). Just an idea :-) Regards, Chris On Wed, Aug 3, 2011 at 4:18 PM, Rick Wesson wrote: > Starting from bitcoinj, I have plenty of ways to publish DNS. Why sort them > by version? Ordering from highest to lowest? > > how about publishing addresses under version.example.com if you version > has a perfrence? > > -rick > > > On Wed, Aug 3, 2011 at 7:10 AM, Mike Hearn wrote: > >> There's no project currently :-) >> >> Starting from Matts code is probably the way to go. It's written in PHP. >> Alternatively, you could write a Java app for it, as there are drop-in DNS >> serving libraries you could link with BitCoinJ+sqlite. It probably wouldn't >> be that hard. You'd want to sort nodes by version, how long they've been >> observed to exist, the last polling time, etc. >> >> On Wed, Aug 3, 2011 at 4:00 PM, Rick Wesson < >> rick@support-intelligence.com> wrote: >> >>> Mike, >>> >>> I think I can contribute to your DNS seeding project. Could you help >>> define long-lived peers? >>> >>> -rick >>> >>> >>> On Wed, Aug 3, 2011 at 3:04 AM, Mike Hearn wrote: >>> >>>> This is expected to happen from time to time of course as it's >>>> inherently racy, but there are a *lot* of bad nodes appearing in the >>>> DNS seeds. >>>> >>>> $ nmap -oG /tmp/x -p 8333 `dig +short bitseed.bitcoin.org.uk >>>> dnsseed.bluematt.me bitseed.xf2.org` >>>> ... >>>> Nmap done: 48 IP addresses (25 hosts up) scanned in 9.80 seconds >>>> >>>> $ grep -c 'closed' /tmp/x >>>> 6 >>>> >>>> So of 48 IPs returned only 19 are actually usable. This is slowing down >>>> peer bringup for the Android apps, which don't currently save the addresses >>>> of last-used peers (yes, I know we should fix this). >>>> >>>> I was talking to a friend a few days ago about Bitcoin, he seemed >>>> interested. I'm hoping he might take on DNS seeding as a project. A custom >>>> DNS server that watches the network to find long-lived peers that run the >>>> latest version would be helpful for resolving this kind of thing. >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA >>>> The must-attend event for mobile developers. Connect with experts. >>>> Get tools for creating Super Apps. See the latest technologies. >>>> Sessions, hands-on labs, demos & much more. Register early & save! >>>> http://p.sf.net/sfu/rim-blackberry-1 >>>> _______________________________________________ >>>> Bitcoin-development mailing list >>>> Bitcoin-development@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/bitcoin-development >>>> >>>> >>> >> > > > ------------------------------------------------------------------------------ > BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA > The must-attend event for mobile developers. Connect with experts. > Get tools for creating Super Apps. See the latest technologies. > Sessions, hands-on labs, demos & much more. Register early & save! > http://p.sf.net/sfu/rim-blackberry-1 > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > >