From: Artur Skawina <art.08.09@gmail.com>
To: Nguyen Thai Ngoc Duy <pclouds@gmail.com>
Cc: Luke Kenneth Casson Leighton <luke.leighton@gmail.com>,
Nicolas Pitre <nico@fluxnic.net>, Ted Ts'o <tytso@mit.edu>,
Junio C Hamano <gitster@pobox.com>, git <git@vger.kernel.org>
Subject: Re: git pack/unpack over bittorrent - works!
Date: Sat, 04 Sep 2010 03:52:59 +0200 [thread overview]
Message-ID: <4C81A67B.2060400@gmail.com> (raw)
In-Reply-To: <AANLkTinoyehduhdHSEm5yGTLvU6C-ViE885yLd63iQU0@mail.gmail.com>
Hmm, taking a few steps back, what is the expected usage of git-p2p?
Note it's a bit of a trick question; what i'm really asking is what _else_,
other than pulling/tracking Linus' kernel tree will/can be done with it?
Because once you accept that all peers are equal, but some peers are more
equal than others, deriving a canonical representation of the object store
becomes relatively simple. Then, it's just a question of fetching the missing
bits, whether using a dumb (rsync-like) transport, or a git-aware protocol.
(I've no idea why you'd want to base a transfer protocol on the unstable packs,
building it on top of objects seems to be the only sane choice)
I'm mostly git-ignorant and i'm assuming the following two things -- if someone
more familiar w/ git internals could confirm/deny, that would be great:
1) "git pull git:..." would (or could be made to) work w/ a client that asks for
"A..E", but also tells the server to omit "B,C and D" from the wire traffic.
2) Git doesn't use chained deltas. IOW given commits "A --d1-> B --d2-> C",
"C" can be represented as a delta against "A" or "B", but _not_ against "d1".
(Think of the case where "C" reverts /part of/ "B")
Then there are security implications... Which pretty much mandate having "special"
peers anyway, at least for transferring heads (branches/tags etc). Which means
the second paragraph above applies. And as the "special peer" in practice can be
just a signed tag/commit, like "v2.6.35", it's not such a big limitation like it
may seem at first...
artur
next prev parent reply other threads:[~2010-09-04 1:53 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-01 14:36 git pack/unpack over bittorrent - works! Luke Kenneth Casson Leighton
2010-09-01 22:04 ` Nguyen Thai Ngoc Duy
2010-09-02 13:37 ` Luke Kenneth Casson Leighton
2010-09-02 13:53 ` Luke Kenneth Casson Leighton
2010-09-02 14:08 ` Ævar Arnfjörð Bjarmason
2010-09-02 15:33 ` A Large Angry SCM
2010-09-02 15:42 ` Luke Kenneth Casson Leighton
2010-09-02 15:51 ` Luke Kenneth Casson Leighton
2010-09-02 17:06 ` A Large Angry SCM
2010-09-02 15:58 ` Jeff King
2010-09-02 16:41 ` Nicolas Pitre
2010-09-02 17:09 ` A Large Angry SCM
2010-09-02 17:31 ` Nicolas Pitre
2010-09-02 19:17 ` Luke Kenneth Casson Leighton
2010-09-02 19:29 ` Shawn O. Pearce
2010-09-02 19:51 ` Luke Kenneth Casson Leighton
2010-09-02 20:06 ` Luke Kenneth Casson Leighton
2010-09-03 0:36 ` Nicolas Pitre
2010-09-03 10:34 ` Luke Kenneth Casson Leighton
2010-09-03 17:03 ` Junio C Hamano
2010-09-02 20:28 ` Brandon Casey
2010-09-02 20:48 ` Luke Kenneth Casson Leighton
2010-09-02 20:45 ` Jakub Narebski
2010-09-02 21:10 ` Luke Kenneth Casson Leighton
2010-09-02 21:19 ` Luke Kenneth Casson Leighton
2010-09-03 0:29 ` Nicolas Pitre
2010-09-03 2:48 ` Nguyen Thai Ngoc Duy
2010-09-03 10:55 ` Luke Kenneth Casson Leighton
2010-09-03 10:23 ` Luke Kenneth Casson Leighton
2010-09-03 10:54 ` Luke Kenneth Casson Leighton
2010-09-02 18:07 ` Luke Kenneth Casson Leighton
2010-09-02 18:23 ` Casey Dahlin
2010-09-02 16:58 ` A Large Angry SCM
2010-09-02 17:21 ` Nicolas Pitre
2010-09-02 19:41 ` Luke Kenneth Casson Leighton
2010-09-02 19:52 ` A Large Angry SCM
2010-09-02 23:09 ` Nicolas Pitre
2010-09-03 10:37 ` Theodore Tso
2010-09-03 11:04 ` Luke Kenneth Casson Leighton
2010-09-03 17:12 ` Junio C Hamano
2010-09-03 18:31 ` Ted Ts'o
2010-09-03 19:41 ` Nicolas Pitre
2010-09-03 21:11 ` Luke Kenneth Casson Leighton
2010-09-04 0:24 ` Nguyen Thai Ngoc Duy
2010-09-04 0:57 ` Nguyen Thai Ngoc Duy
2010-09-04 1:52 ` Artur Skawina [this message]
2010-09-04 4:39 ` Nicolas Pitre
2010-09-04 5:42 ` Artur Skawina
2010-09-04 6:13 ` Nicolas Pitre
2010-09-04 11:58 ` Luke Kenneth Casson Leighton
2010-09-04 13:14 ` Luke Kenneth Casson Leighton
2010-09-05 2:16 ` Nicolas Pitre
2010-09-05 18:05 ` Luke Kenneth Casson Leighton
2010-09-05 23:52 ` Nicolas Pitre
2010-09-06 13:23 ` Luke Kenneth Casson Leighton
2010-09-06 16:51 ` Nicolas Pitre
2010-09-06 22:33 ` Luke Kenneth Casson Leighton
2010-09-06 23:34 ` Junio C Hamano
2010-09-06 23:57 ` Nicolas Pitre
2010-09-07 0:17 ` Luke Kenneth Casson Leighton
2010-09-07 0:29 ` Luke Kenneth Casson Leighton
2010-09-04 13:42 ` Artur Skawina
[not found] ` <20100904155638.GA17606@pcpool00.mathematik.uni-freiburg.de>
2010-09-04 17:23 ` Artur Skawina
2010-09-04 18:46 ` Artur Skawina
2010-09-04 1:57 ` Theodore Tso
2010-09-04 5:23 ` Kyle Moffett
2010-09-04 11:46 ` Theodore Tso
2010-09-04 14:06 ` Luke Kenneth Casson Leighton
2010-09-05 1:32 ` Nicolas Pitre
2010-09-05 17:16 ` Luke Kenneth Casson Leighton
2010-09-04 5:40 ` Nicolas Pitre
2010-09-04 12:00 ` Theodore Tso
2010-09-04 12:44 ` Luke Kenneth Casson Leighton
2010-09-04 14:50 ` Luke Kenneth Casson Leighton
2010-09-04 18:14 ` Ted Ts'o
2010-09-04 20:00 ` Luke Kenneth Casson Leighton
2010-09-04 22:41 ` Ted Ts'o
2010-09-05 17:22 ` Luke Kenneth Casson Leighton
2010-09-04 20:20 ` Jakub Narebski
2010-09-04 20:47 ` Luke Kenneth Casson Leighton
2010-09-04 21:16 ` Jakub Narebski
2010-09-04 21:24 ` Luke Kenneth Casson Leighton
2010-09-04 22:47 ` Ted Ts'o
2010-09-05 1:43 ` Tomas Carnecky
2010-09-05 1:18 ` Nicolas Pitre
2010-09-05 17:25 ` Luke Kenneth Casson Leighton
2010-09-06 0:05 ` Nicolas Pitre
2010-09-04 12:33 ` Luke Kenneth Casson Leighton
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