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From: Gregory Maxwell <gmaxwell@gmail•com>
To: Jeff Garzik <jgarzik@bitpay•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Proposed additional options for pruned nodes
Date: Tue, 12 May 2015 20:02:36 +0000	[thread overview]
Message-ID: <CAAS2fgTCMeNdcmMxURxaoAJn8=XZnTP8Gp6PbRk5w7KXAZ8t3g@mail.gmail.com> (raw)
In-Reply-To: <CAJHLa0PDbxuqRHuGNhsyvLpAaDq=ZHSg_u-Sb7FqNVnYrhFkFg@mail.gmail.com>

On Tue, May 12, 2015 at 7:38 PM, Jeff Garzik <jgarzik@bitpay•com> wrote:
> One general problem is that security is weakened when an attacker can DoS a
> small part of the chain by DoS'ing a small number of nodes - yet the impact
> is a network-wide DoS because nobody can complete a sync.

It might be more interesting to think of that attack as a bandwidth
exhaustion DOS attack on the archive nodes... if you can't get a copy
without them, thats where you'll go.

So the question arises: does the option make some nodes that would
have been archive not be? Probably some-- but would it do so much that
it would offset the gain of additional copies of the data when those
attacks are not going no. I suspect not.

It's also useful to give people incremental ways to participate even
when they can't swollow the whole pill; or choose to provide the
resource thats cheap for them to provide.  In particular, if there is
only two kinds of full nodes-- archive and pruned; then the archive
nodes take both a huge disk and bandwidth cost; where as if there are
fractional then archives take low(er) bandwidth unless the fractionals
get DOS attacked.



  parent reply	other threads:[~2015-05-12 20:02 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CANJO25J1WRHtfQLVXUB2s_sjj39pTPWmixAcXNJ3t-5os8RPmQ@mail.gmail.com>
2015-05-12 15:26 ` gabe appleton
2015-05-12 16:05   ` Jeff Garzik
2015-05-12 16:56     ` gabe appleton
2015-05-12 17:16     ` Peter Todd
2015-05-12 18:23       ` Tier Nolan
2015-05-12 19:03         ` Gregory Maxwell
2015-05-12 19:24           ` gabe appleton
2015-05-12 19:38             ` Jeff Garzik
2015-05-12 19:43               ` gabe appleton
2015-05-12 21:30                 ` [Bitcoin-development] [Bulk] " gb
2015-05-12 20:02               ` Gregory Maxwell [this message]
2015-05-12 20:10                 ` [Bitcoin-development] " Jeff Garzik
2015-05-12 20:41                   ` gabe appleton
2015-05-12 20:47                   ` Gregory Maxwell
     [not found]               ` <CAFVoEQTdmCSRAy3u26q5oHdfvFEytZDBfQb_fs_qttK15fiRmg@mail.gmail.com>
     [not found]                 ` <CAJHLa0OxxxiVd3JOp8SDvbF8dHj6KHdUNGb9L_GvTe93z3Z8mg@mail.gmail.com>
     [not found]                   ` <CAJHLa0MYSpVBD4VE65LVbADb2daOvE=N83G8F_zDSHy3AQ5DAQ@mail.gmail.com>
2015-05-12 21:17                     ` [Bitcoin-development] Fwd: " Adam Weiss
2015-05-12 22:00           ` [Bitcoin-development] " Tier Nolan
2015-05-12 22:09             ` gabe appleton
2015-05-13  5:19           ` Daniel Kraft
2015-05-13  9:34             ` Tier Nolan

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