Return-Path: <dev@jonasschnelli.ch>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
	[172.17.192.35])
	by mail.linuxfoundation.org (Postfix) with ESMTPS id 3D01D10EF
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 25 Jan 2016 16:12:07 +0000 (UTC)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.6
Received: from server3 (server3.include7.ch [144.76.194.38])
	by smtp1.linuxfoundation.org (Postfix) with ESMTP id A73F779
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 25 Jan 2016 16:12:06 +0000 (UTC)
Received: by server3 (Postfix, from userid 115)
	id ED33F2E6048D; Mon, 25 Jan 2016 17:12:04 +0100 (CET)
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	smtp1.linux-foundation.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, FSL_HELO_NON_FQDN_1
	autolearn=ham version=3.3.1
Received: from Jonass-MacBook-Pro.local (84-73-32-8.dclient.hispeed.ch
	[84.73.32.8]) by server3 (Postfix) with ESMTPSA id 46F3B2D0039D
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Mon, 25 Jan 2016 17:12:04 +0100 (CET)
To: bitcoin-dev@lists.linuxfoundation.org
References: <20160117100808.GA4299@amethyst.visucore.com>
	<1591452.8UA7xN1qih@1337h4x0r>
	<20160125120317.GB17769@amethyst.visucore.com>
	<2815165.aykQg88K5r@1337h4x0r>
	<20160125150559.GA28847@amethyst.visucore.com>
	<2A118822-6550-4042-9229-1D213B6FE615@coingyft.com>
From: Jonas Schnelli <dev@jonasschnelli.ch>
Message-ID: <56A64951.7040405@jonasschnelli.ch>
Date: Mon, 25 Jan 2016 17:12:01 +0100
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0)
	Gecko/20100101 Thunderbird/38.5.1
MIME-Version: 1.0
In-Reply-To: <2A118822-6550-4042-9229-1D213B6FE615@coingyft.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Subject: Re: [bitcoin-dev] Bitcoin Core 0.12.0 release candidate 1 available
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Jan 2016 16:12:07 -0000

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256


> Why is the minimum storage quota of 550 MiB necessary for pruning
> nodes if the block data is not served to other nodes ? Could the
> client just do transaction verification and transaction relaying
> and only keep the block(s) being verified on disk ?
> 

We try to allow reorgs ~288 blocks deep also in pruning:

- From code comments:
Require that user allocate at least 550MB for block & undo files
(blk???.dat and rev???.dat)
At 1MB per block, 288 blocks = 288MB.
Add 15% for Undo data = 331MB
Add 20% for Orphan block rate = 397MB
We want the low water mark after pruning to be at least 397 MB and
since we prune in
full block file chunks, we need the high water mark which triggers the
prune to be
one 128MB block file + added 15% undo data = 147MB greater for a total
of 545MB
Setting the target to > than 550MB will make it likely we can respect
the target.


</jonas>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=lDcA
-----END PGP SIGNATURE-----