From: Jeff Garzik <jgarzik@exmulti•com>
To: Pieter Wuille <pieter.wuille@gmail•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Service bits for pruned nodes
Date: Wed, 1 May 2013 09:46:08 -0400 [thread overview]
Message-ID: <CA+8xBpcN0Oz8yyAPRbs-Nfrgcnq8T-ANdF5aro54KkTTs9ZfNg@mail.gmail.com> (raw)
In-Reply-To: <CAPg+sBjSe23eADMxu-1mx0Kg2LGkN+BSNByq0PtZcMxAMh0uTg@mail.gmail.com>
On Sun, Apr 28, 2013 at 11:51 AM, Pieter Wuille <pieter.wuille@gmail•com> wrote:
> Hello all,
>
> I think it is time to move forward with pruning nodes, i.e. nodes that fully
> validate and relay blocks and transactions, but which do not keep (all)
> historic blocks around, and thus cannot be queried for these.
>
> The biggest roadblock is making sure new and old nodes that start up are
> able to find nodes to synchronize from. To help them find peers, I would
> like to propose adding two extra service bits to the P2P protocol:
> * NODE_VALIDATE: relay and validate blocks and transactions, but is only
> guaranteed to answer getdata requests for (recently) relayed blocks and
> transactions, and mempool transactions.
> * NODE_BLOCKS_2016: can be queried for the last 2016 blocks, but without
> guarantee for relaying/validating new blocks and transactions.
> * NODE_NETWORK (which existed before) will imply NODE_VALIDATE and guarantee
> availability of all historic blocks.
In general, I support this, as anybody on IRC knows.
Though it does seem to open the question about snapshotting.
Personally, it seems important to enable running a fully validating
node, that may bootstrap from a UTXO snapshot + all blocks since that
snapshot.
NODE_BLOCKS_2016, in particular, is too short. For users, I've seen
plenty of use cases in the field where you start a network sync after
a 2-week period.
Set a regular interval for creating a UTXO snapshot, say 3 months
(6*2016 blocks), and serve all blocks after that snapshot. For older
nodes, they would contact an archive node or torrent for >3 month
blocks, and then download normally <= 3 month blocks (if the archive
node didn't serve up to present day).
Where are we on nailing down a stable, hash-able UTXO serialization?
--
Jeff Garzik
exMULTI, Inc.
jgarzik@exmulti•com
next prev parent reply other threads:[~2013-05-01 13:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-28 15:51 Pieter Wuille
2013-04-28 16:29 ` Mike Hearn
2013-04-28 16:44 ` Pieter Wuille
2013-04-28 16:57 ` Mike Hearn
2013-05-03 12:30 ` Pieter Wuille
2013-05-03 14:06 ` Mike Hearn
2013-05-03 14:18 ` Peter Todd
2013-05-03 15:02 ` Mike Hearn
2013-05-03 15:11 ` Peter Todd
2013-05-04 18:07 ` John Dillon
2013-05-04 18:55 ` Jeff Garzik
2013-05-05 13:12 ` John Dillon
2013-05-06 8:19 ` Mike Hearn
2013-05-06 13:13 ` Pieter Wuille
2013-04-28 19:50 ` Gregory Maxwell
2013-04-29 2:57 ` John Dillon
2013-04-29 3:36 ` Gregory Maxwell
2013-04-29 3:42 ` Robert Backhaus
2013-04-29 3:48 ` John Dillon
2013-04-29 3:55 ` Peter Todd
2013-04-29 6:10 ` Jay F
[not found] ` <CAFBxzACw=G7UgG853zQrM-Z1-B4VqSQR5YUJQ5n1=wnv7EyWsw@mail.gmail.com>
2013-04-30 16:14 ` [Bitcoin-development] Fwd: " Rebroad (sourceforge)
2013-04-30 18:04 ` Jeff Garzik
2013-04-30 19:27 ` Andy Parkins
2013-04-30 19:31 ` Simon Barber
2013-04-30 20:11 ` Jeff Garzik
2013-05-01 14:05 ` Andy Parkins
2013-05-01 14:26 ` Jeff Garzik
2013-05-01 14:34 ` Andy Parkins
2013-04-30 20:06 ` [Bitcoin-development] " Brenton Camac
2013-05-01 13:46 ` Jeff Garzik [this message]
2013-05-16 11:26 Ricardo Filipe
2013-05-16 15:47 ` Jeff Garzik
2013-05-16 16:23 ` Ricardo Filipe
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