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Date: Tue, 6 Sep 2011 15:31:34 +0200
Message-ID: <CANEZrP3=UPYkBQo6b421xaMGyP4BsGiw8DBuM8pT2ow1Vom9JQ@mail.gmail.com>
From: Mike Hearn <mike@plan99.net>
To: shadders.del@gmail.com
Content-Type: multipart/alternative; boundary=bcaec51d2780a7728104ac45d899
Cc: bitcoin-development@lists.sourceforge.net
Subject: Re: [Bitcoin-development] Building a node crawler to map network
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>
> I've looked but can't find a post like you're talking about.  Can you point
> me to it?
>

https://groups.google.com/forum/?pli=1#!topic/bitcoinj/LSlZdUWcCdk


> If so then bollocks... I'm looking for something useful to do atm.
>  PoolServerJ is in a holding pattern atm as I've stabilisied all the bugs I
> know about and am waiting for several pools to finish testing and move into
> production so I'm twiddling thumbs trying to figure out how to spend my
> time.
>

Patches to BitCoinJ are always welcome :-)

If you'd rather do your own thing, you could experiment with writing a proxy
that sits in front of bitcoind and multiplexes connections. Gavin is
concerned about socket exhaustion as users move to lightweight clients.
Multiplexing proxies are a battle-tested technique for reducing the strain
of this type of thing. BitCoinJ uses thread-per-connection so wouldn't do a
good job of that right now, but allowing it to use a mix of async io and
multi-threading would be a nice improvement. It'd need some changes to
bitcoind as well for a really good effort, to allow for IPs to be forwarded.
I'm happy to discuss it more with you over on the bitcoinj list if wanted.

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<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class=3D"im=
">I&#39;ve looked but can&#39;t find a post like you&#39;re talking about. =
=C2=A0Can you point me to it?<br>
</div></blockquote><div>=C2=A0</div><div><a href=3D"https://groups.google.c=
om/forum/?pli=3D1#!topic/bitcoinj/LSlZdUWcCdk">https://groups.google.com/fo=
rum/?pli=3D1#!topic/bitcoinj/LSlZdUWcCdk</a></div><div>=C2=A0</div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex;">
<div class=3D"im">If so then bollocks... I&#39;m looking for something usef=
ul to do atm. =C2=A0PoolServerJ is in a holding pattern atm as I&#39;ve sta=
bilisied all the bugs I know about and am waiting for several pools to fini=
sh testing and move into production so I&#39;m twiddling thumbs trying to f=
igure out how to spend my time.</div>
</blockquote><div><br></div><div>Patches to BitCoinJ are always welcome :-)=
</div><div><br></div><div>If you&#39;d rather do your own thing, you could =
experiment with writing a proxy that sits in front of bitcoind and multiple=
xes connections. Gavin is concerned about socket exhaustion as users move t=
o lightweight clients. Multiplexing proxies are a battle-tested technique f=
or reducing the strain of this type of thing. BitCoinJ uses thread-per-conn=
ection so wouldn&#39;t do a good job of that right now, but allowing it to =
use a mix of async io and multi-threading would be a nice improvement. It&#=
39;d need some changes to bitcoind as well for a really good effort, to all=
ow for IPs to be forwarded. I&#39;m happy to discuss it more with you over =
on the bitcoinj list if wanted.</div>
</div>

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