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From: Lars Magne Ingebrigtsen <larsi@gnus.org>
To: emacs-devel@gnu.org
Subject: Re: Determining whether a TCP connection is up
Date: Mon, 05 Aug 2013 04:12:50 +0200	[thread overview]
Message-ID: <m37gg0lwbh.fsf@stories.gnus.org> (raw)
In-Reply-To: <87txj64vbx.fsf@dex.adm.naquadah.org> (Julien Danjou's message of "Sat, 03 Aug 2013 18:01:38 +0200")

Julien Danjou <julien@danjou.info> writes:

> I think most IMAP clients uses a pool of several connections in the
> background to deliver actions based on some sort of queue, like delete
> something or fetch this. Having this would solve partially the problem
> since if a connection goes AWOL, you just have to wait for the kernel to
> kill the TCP connection it at some point (which might takes time), but
> you can continue to create new (working) connections to fulfil the user
> requests in the meantime, and then requeue the action that timed-out.

Whether you have a pool of connections or kill/reconnect, the problem
remains the same: Figuring out when to switch connections/reconnect.

And in the case that the IP address changed, all your connections in the
pool will hang, so it doesn't really help...

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html



  reply	other threads:[~2013-08-05  2:12 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-03 12:30 Determining whether a TCP connection is up Lars Magne Ingebrigtsen
2013-08-03 14:09 ` Paul Eggert
2013-08-03 16:01 ` Julien Danjou
2013-08-05  2:12   ` Lars Magne Ingebrigtsen [this message]
2013-08-05  2:33     ` chad
2013-08-05  2:37       ` Lars Magne Ingebrigtsen
2013-08-05 10:34     ` Julien Danjou
2013-08-05 14:40       ` Stefan Monnier
2013-08-05 15:23         ` Thierry Volpiatto
2013-08-05 15:51         ` Julien Danjou
2013-08-05 17:55       ` Lars Magne Ingebrigtsen
2013-08-06  8:51         ` Julien Danjou
2013-08-06  9:59           ` joakim
2013-08-06 13:36           ` Lars Magne Ingebrigtsen
2013-08-06 21:32             ` Stefan Monnier
2013-08-12 17:09               ` Lars Magne Ingebrigtsen
2013-08-13  1:52                 ` Stefan Monnier

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