From: Petr Baudis <pasky@ucw.cz>
To: "Adam J. Richter" <adam@yggdrasil.com>
Cc: mpm@selenic.com, git@vger.kernel.org, jgarzik@pobox.com,
linux-kernel@vger.kernel.org, mercurial@selenic.com,
torvalds@osdl.org
Subject: Re: Mercurial 0.4e vs git network pull
Date: Sun, 15 May 2005 14:40:42 +0200 [thread overview]
Message-ID: <20050515124042.GE13024@pasky.ji.cz> (raw)
In-Reply-To: <200505151122.j4FBMJa01073@adam.yggdrasil.com>
Dear diary, on Sun, May 15, 2005 at 01:22:19PM CEST, I got a letter
where "Adam J. Richter" <adam@yggdrasil.com> told me that...
> On Sun, 15 May 2005 10:54:05 +0200, Petr Baudis wrote:
> >Dear diary, on Thu, May 12, 2005 at 10:57:35PM CEST, I got a letter
> >where Matt Mackall <mpm@selenic.com> told me that...
> >> Does this need an HTTP request (and round trip) per object? It appears
> >> to. That's 2200 requests/round trips for my 800 patch benchmark.
>
> >Yes it does. On the other side, it needs no server-side CGI. But I guess
> >it should be pretty easy to write some kind of server-side CGI streamer,
> >and it would then easily take just a single HTTP request (telling the
> >server the commit ID and receiving back all the objects).
>
> I don't understand what was wrong with Jeff Garzik's previous
> suggestion of using http/1.1 pipelining to coalesce the round trips.
> If you're worried about queuing too many http/1.1 requests, the client
> could adopt a policy of not having more than a certain number of
> requests outstanding or perhaps even making a new http connection
> after a certain number of requests to avoid starving other clients
> when the number of clients doing one of these transfers exceeds the
> number of threads that the http server uses.
The problem is that to fetch a revision tree, you have to
send request for commit A
receive commit A
look at commit A for list of its parents
send request for the parents
receive the parents
look inside for list of its parents
...
(and same for the trees).
> Being able to do without a server side CGI script might
> encourage deployment a bit more, both for security reasons and
> effort of deployment.
You could still use it without the server side CGI script as it is now,
just without the speedups.
--
Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
C++: an octopus made by nailing extra legs onto a dog. -- Steve Taylor
next prev parent reply other threads:[~2005-05-15 12:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-15 11:22 Mercurial 0.4e vs git network pull Adam J. Richter
2005-05-15 12:40 ` Petr Baudis [this message]
2005-05-16 22:22 ` Tristan Wibberley
2005-05-15 17:39 ` Matt Mackall
2005-05-15 18:23 ` Jeff Garzik
2005-05-16 1:12 ` Matt Mackall
2005-05-16 9:29 ` Matthias Urlichs
-- strict thread matches above, loose matches on Subject: below --
2005-05-15 11:52 Adam J. Richter
2005-05-15 14:23 ` Petr Baudis
2005-05-12 9:44 Matt Mackall
2005-05-12 18:23 ` Petr Baudis
2005-05-12 20:11 ` Matt Mackall
2005-05-12 20:14 ` Petr Baudis
2005-05-12 20:57 ` Matt Mackall
2005-05-12 21:24 ` Daniel Barkalow
2005-05-12 22:29 ` Matt Mackall
2005-05-13 0:33 ` Daniel Barkalow
2005-05-13 1:11 ` Matt Mackall
2005-05-13 2:23 ` Daniel Barkalow
2005-05-13 2:44 ` Matt Mackall
2005-05-13 5:44 ` Petr Baudis
2005-05-15 8:54 ` Petr Baudis
2005-05-15 6:22 ` Ingo Molnar
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