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From: Tamas Blummer <tamas@bitsofproof.com>
In-Reply-To: <CAAS2fgTx40XSLhiygnJMrSbOC=iJ2YMVLNK7-AMt3ifvAHDZUA@mail.gmail.com>
Date: Wed, 9 Apr 2014 18:09:13 +0200
Message-Id: <E9BAD633-3B6A-4A2C-AA06-DB591973DF66@bitsofproof.com>
References: <CA+s+GJCn9U2kmyMH6w3o+m99NCfO0ws=SccvGBYJv07WVuF=eA@mail.gmail.com>
	<CAADm4BCEFCiOpNzUThPPHUamP2256izU8pwD3nerLCxks0wENA@mail.gmail.com>
	<CAAS2fgTx40XSLhiygnJMrSbOC=iJ2YMVLNK7-AMt3ifvAHDZUA@mail.gmail.com>
To: Gregory Maxwell <gmaxwell@gmail.com>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Bitcoind-in-background mode for SPV
	wallets
Precedence: list


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I am glad that SPV wallets are discussed outside the scope of mobile =
devices!

Yes, SPV is a sufficient API to a trusted node to build sophisticated =
features not offered by the core.
SPV clients of the border router will build their own archive and =
indices based on their interest of the chain therefore the
border router core does not need to store (and process) anything not =
needed for consensus, its memory
or disk footprint would be as low as an optimal storage of UTXO.

Regards,

Tam=E1s Blummer
http://bitsofproof.com

On 09.04.2014, at 17:57, Gregory Maxwell <gmaxwell@gmail.com> wrote:

> On Wed, Apr 9, 2014 at 8:42 AM, Brian Hoffman =
<brianchoffman@gmail.com> wrote:
>> How would this affect the user in terms of disk storage? They're =
going to
>> get hammered on space constraints aren't they? If it's not required =
how
>> likely are users to enable this?
>=20
> If Bitcoin core activates pruning a full node can be supported in=97
> say=97 4GBytes or so. (That gives enough space to store the utxo about
> 350MB now, and a couple gigs for blocks to serve out).
>=20
> I'd imagine getting information from SPV wallet developers how much
> disk usage agility they think is required is part of what Wladimir is
> looking for.
>=20
> =
--------------------------------------------------------------------------=
----
> Put Bad Developers to Shame
> Dominate Development with Jenkins Continuous Integration
> Continuously Automate Build, Test & Deployment=20
> Start a new project now. Try Jenkins in the cloud.
> http://p.sf.net/sfu/13600_Cloudbees
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I am =
glad that SPV wallets are discussed outside the scope of mobile =
devices!<br><div apple-content-edited=3D"true"><br></div><div =
apple-content-edited=3D"true">
Yes, SPV is a sufficient API to a trusted node to build sophisticated =
features not offered by the core.</div><div =
apple-content-edited=3D"true">SPV clients of the border router will =
build their own archive and indices based on their interest of the chain =
therefore the</div><div apple-content-edited=3D"true">border router core =
does not need to store (and process) anything not needed for consensus, =
its memory</div><div apple-content-edited=3D"true">or disk footprint =
would be as low as an optimal storage of UTXO.</div><div =
apple-content-edited=3D"true"><br></div><div =
apple-content-edited=3D"true"><span style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; text-align: -webkit-auto; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; orphans: 2; widows: 2; float: none; =
display: inline !important;">Regards,</span><br style=3D"color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; text-align: -webkit-auto; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; orphans: 2; widows: 2;"><br =
style=3D"color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; text-align: -webkit-auto; =
text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; widows: =
2;"><span style=3D"color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; =
widows: 2; float: none; display: inline !important;">Tam=E1s =
Blummer</span><br style=3D"color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; =
widows: 2;"><span style=3D"color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><span style=3D"color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; text-align: =
-webkit-auto; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: 2; =
widows: 2; float: none; display: inline !important;"><a =
href=3D"http://bitsofproof.com">http://bitsofproof.com</a></span>
</span></div>
<br><div><div>On 09.04.2014, at 17:57, Gregory Maxwell &lt;<a =
href=3D"mailto:gmaxwell@gmail.com">gmaxwell@gmail.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite">On Wed, Apr 9, 2014 at 8:42 AM, Brian Hoffman &lt;<a =
href=3D"mailto:brianchoffman@gmail.com">brianchoffman@gmail.com</a>&gt; =
wrote:<br><blockquote type=3D"cite">How would this affect the user in =
terms of disk storage? They're going to<br>get hammered on space =
constraints aren't they? If it's not required how<br>likely are users to =
enable this?<br></blockquote><br>If Bitcoin core activates pruning a =
full node can be supported in=97<br>say=97 4GBytes or so. (That gives =
enough space to store the utxo about<br>350MB now, and a couple gigs for =
blocks to serve out).<br><br>I'd imagine getting information from SPV =
wallet developers how much<br>disk usage agility they think is required =
is part of what Wladimir is<br>looking =
for.<br><br>--------------------------------------------------------------=
----------------<br>Put Bad Developers to Shame<br>Dominate Development =
with Jenkins Continuous Integration<br>Continuously Automate Build, Test =
&amp; Deployment <br>Start a new project now. Try Jenkins in the =
cloud.<br><a =
href=3D"http://p.sf.net/sfu/13600_Cloudbees">http://p.sf.net/sfu/13600_Clo=
udbees</a><br>_______________________________________________<br>Bitcoin-d=
evelopment mailing =
list<br>Bitcoin-development@lists.sourceforge.net<br>https://lists.sourcef=
orge.net/lists/listinfo/bitcoin-development<br></blockquote></div><br></bo=
dy></html>=

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