From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 3B3904A5 for ; Thu, 23 Jul 2015 15:55:17 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-wi0-f182.google.com (mail-wi0-f182.google.com [209.85.212.182]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 350F5F0 for ; Thu, 23 Jul 2015 15:55:16 +0000 (UTC) Received: by wibxm9 with SMTP id xm9so156154173wib.1 for ; Thu, 23 Jul 2015 08:55:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=hK+6/ik6rqUxByAMVjIxYpf0NSYBow9ELn0aFz/UMuI=; b=Przkj0MNBmpl03doUbF4tAXdPqSSLH+GN3vVvDhQdi8CLZH0Zp2vTFMV/uOrzallrd lqTNXz26A2JAONZxW7KZGtPhNIEvSrmOtZ5QBeersfTq4uphtig+6P+liidZGwNdDnh5 6gdUhchwOjjjlW6q8pygbIHRyhpnDRCICy4GuFkfs6ugQJq5E0/R+toVQyJJtnhFTWFN KO+xakq+tZ1rGnjAHbATan0FHW0+ud0gONlgSJUc3trLOyXDQSAOOTgxo1NkxOsBedkX a6BDBv1F6bZB9OK4A3FjrwuzFF7iM/fR9WmMaNw1ocnX+s2yVLdQEzyXnha5gW/W0gO0 i4Ag== MIME-Version: 1.0 X-Received: by 10.194.209.167 with SMTP id mn7mr16592169wjc.64.1437666914897; Thu, 23 Jul 2015 08:55:14 -0700 (PDT) Received: by 10.27.171.138 with HTTP; Thu, 23 Jul 2015 08:55:14 -0700 (PDT) In-Reply-To: References: Date: Thu, 23 Jul 2015 11:55:14 -0400 Message-ID: From: Jameson Lopp To: slurms@gmx.us Content-Type: multipart/alternative; boundary=047d7b3a8954c4959f051b8ce9b3 X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: bitcoin-dev@lists.linuxfoundation.org Subject: Re: [bitcoin-dev] Bitcoin Node Speed Test X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jul 2015 15:55:17 -0000 --047d7b3a8954c4959f051b8ce9b3 Content-Type: text/plain; charset=UTF-8 Are you willing to share the code that you used to run the test? - Jameson On Thu, Jul 23, 2015 at 10:19 AM, slurms--- via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote: > On this day, the Bitcoin network was crawled and reachable nodes surveyed > to find their maximum throughput in order to determine if it can safely > support a faster block rate. Specifically this is an attempt to prove or > disprove the common statement that 1MB blocks were only suitable slower > internet connections in 2009 when Bitcoin launched, and that connection > speeds have improved to the point of obviously supporting larger blocks. > > > The testing methodology is as follows: > > * Nodes were randomly selected from a peers.dat, 5% of the reachable > nodes in the network were contacted. > > * A random selection of blocks was downloaded from each peer. > > * There is some bias towards higher connection speeds, very slow > connections (<30KB/s) timed out in order to run the test at a reasonable > rate. > > * The connecting node was in Amsterdam with a 1GB NIC. > > > Results: > > * 37% of connected nodes failed to upload blocks faster than 1MB/s. > > * 16% of connected nodes uploaded blocks faster than 10MB/s. > > * Raw data, one line per connected node, kilobytes per second > http://pastebin.com/raw.php?i=6b4NuiVQ > > > This does not support the theory that the network has the available > bandwidth for increased block sizes, as in its current state 37% of nodes > would fail to upload a 20MB block to a single peer in under 20 seconds > (referencing a number quoted by Gavin). If the bar for suitability is > placed at taking only 1% of the block time (6 seconds) to upload one block > to one peer, then 69% of the network fails for 20MB blocks. For comparison, > only 10% fail this metric for 1MB blocks. > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev > --047d7b3a8954c4959f051b8ce9b3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Are you willing to share the code that you used to run the= test?

- Jameson
<= br>
On Thu, Jul 23, 2015 at 10:19 AM, slurms--- v= ia bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org<= /a>> wrote:
On this day, the Bi= tcoin network was crawled and reachable nodes surveyed to find their maximu= m throughput in order to determine if it can safely support a faster block = rate. Specifically this is an attempt to prove or disprove the common state= ment that 1MB blocks were only suitable slower internet connections in 2009= when Bitcoin launched, and that connection speeds have improved to the poi= nt of obviously supporting larger blocks.


The testing methodology is as follows:

=C2=A0* Nodes were randomly selected from a peers.dat, 5% of the reachable = nodes in the network were contacted.

=C2=A0* A random selection of blocks was downloaded from each peer.

=C2=A0* There is some bias towards higher connection speeds, very slow conn= ections (<30KB/s) timed out in order to run the test at a reasonable rat= e.

=C2=A0* The connecting node was in Amsterdam with a 1GB NIC.

=C2=A0
Results:

=C2=A0* 37% of connected nodes failed to upload blocks faster than 1MB/s.
=C2=A0* 16% of connected nodes uploaded blocks faster than 10MB/s.

=C2=A0* Raw data, one line per connected node, kilobytes per second http://pastebin.com/raw.php?i=3D6b4NuiVQ


This does not support the theory that the network has the available bandwid= th for increased block sizes, as in its current state 37% of nodes would fa= il to upload a 20MB block to a single peer in under 20 seconds (referencing= a number quoted by Gavin). If the bar for suitability is placed at taking = only 1% of the block time (6 seconds) to upload one block to one peer, then= 69% of the network fails for 20MB blocks. For comparison, only 10% fail th= is metric for 1MB blocks.
_______________________________________________
bitcoin-dev mailing list
bitcoin-dev@lists.= linuxfoundation.org
https://lists.linuxfoundation.org/mail= man/listinfo/bitcoin-dev

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