Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WXF5l-0003qp-Tb for bitcoin-development@lists.sourceforge.net; Mon, 07 Apr 2014 19:20:25 +0000 X-ACL-Warn: Received: from wp059.webpack.hosteurope.de ([80.237.132.66]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1WXF5k-0000Kz-Ne for bitcoin-development@lists.sourceforge.net; Mon, 07 Apr 2014 19:20:25 +0000 Received: from [37.143.74.116] (helo=[192.168.0.102]); authenticated by wp059.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) id 1WXF5d-0003n0-TN; Mon, 07 Apr 2014 21:20:17 +0200 Content-Type: multipart/signed; boundary="Apple-Mail=_CEC09327-D31B-4481-9E0D-F14E6E89BB3C"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) From: Tamas Blummer In-Reply-To: Date: Mon, 7 Apr 2014 21:20:31 +0200 Message-Id: <8222EAFD-813E-4046-A751-FD3D04FF6764@bitsofproof.com> References: <5342C833.5030906@gmail.com> <6D430188-CE00-44B1-BD8C-B623CF04D466@icloudtools.net> <6D6E55CE-2F04-4C34-BEE6-98AEF1478346@bitsofproof.com> <8A6DEBA4-EA59-4BAE-95CF-C964C2DBB84B@bitsofproof.com> To: Gregory Maxwell X-Mailer: Apple Mail (2.1874) X-bounce-key: webpack.hosteurope.de; tamas@bitsofproof.com; 1396898424; c43d0f4f; X-Spam-Score: 1.0 (+) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.0 HTML_MESSAGE BODY: HTML included in message X-Headers-End: 1WXF5k-0000Kz-Ne Cc: Bitcoin Development Subject: Re: [Bitcoin-development] Why are we bleeding nodes? X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Apr 2014 19:20:26 -0000 --Apple-Mail=_CEC09327-D31B-4481-9E0D-F14E6E89BB3C Content-Type: multipart/alternative; boundary="Apple-Mail=_F359F0A6-B508-4ECE-97B9-12209E93EB26" --Apple-Mail=_F359F0A6-B508-4ECE-97B9-12209E93EB26 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Once headers are loaded first there is no reason for sequential loading.=20= Validation has to be sequantial, but that step can be deferred until the = blocks before a point are loaded and continous. Tamas Blummer http://bitsofproof.com On 07.04.2014, at 21:03, Gregory Maxwell wrote: > On Mon, Apr 7, 2014 at 12:00 PM, Tamas Blummer = wrote: >> therefore I guess it is more handy to return some bitmap of = pruned/full >> blocks than ranges. >=20 > A bitmap also means high overhead and=97 if it's used to advertise > non-contiguous blocks=97 poor locality, since blocks are fetched > sequentially. >=20 --Apple-Mail=_F359F0A6-B508-4ECE-97B9-12209E93EB26 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252

Once headers are loaded first = there is no reason for sequential = loading. 

Validation has to be sequantial, = but that step can be deferred until the blocks before a point are loaded = and continous.


On 07.04.2014, at 21:03, Gregory Maxwell <gmaxwell@gmail.com> = wrote:

On Mon, Apr 7, 2014 at 12:00 PM, Tamas Blummer <tamas@bitsofproof.com> = wrote:
therefore I guess it is more handy = to return some bitmap of pruned/full
blocks than = ranges.

A bitmap also means high overhead and=97 if = it's used to advertise
non-contiguous blocks=97 poor locality, since = blocks are = fetched
sequentially.


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