atom feed24 messages in net.sourceforge.lists.courier-usersRe: [courier-users] Re: problem couri...
FromSent OnAttachments
Jérôme BollietJan 8, 2003 4:19 am 
Roland SchneiderJan 8, 2003 6:05 am 
Jérôme BollietJan 9, 2003 3:51 am 
Xavier BeaudouinJan 9, 2003 4:28 am 
Roland SchneiderJan 9, 2003 5:09 am 
Sam VarshavchikJan 9, 2003 5:11 am 
Xavier BeaudouinJan 9, 2003 5:54 am 
Jérôme BollietJan 9, 2003 6:37 am 
Brian CandlerJan 9, 2003 7:00 am 
Jérôme BollietJan 9, 2003 7:46 am 
Brian CandlerJan 9, 2003 7:59 am 
Xavier BeaudouinJan 9, 2003 8:04 am 
bi...@mics.org.ukJan 9, 2003 8:15 am 
Jérôme BollietJan 9, 2003 8:43 am 
Matt PavlovichJan 9, 2003 8:56 am 
Brian CandlerJan 9, 2003 9:06 am 
Xavier BeaudouinJan 9, 2003 9:46 am 
Gordon MessmerJan 9, 2003 2:22 pm 
Gordon MessmerJan 9, 2003 2:23 pm 
Sam VarshavchikJan 9, 2003 2:56 pm 
Sam VarshavchikJan 9, 2003 2:56 pm 
Xavier BeaudouinJan 9, 2003 3:49 pm 
Xavier BeaudouinJan 9, 2003 4:03 pm 
Jérôme BollietJan 9, 2003 11:43 pm 
Subject:Re: [courier-users] Re: problem courier pop3d & load average
From:Jérôme Bolliet (jbol@noos.fr)
Date:Jan 9, 2003 7:46:41 am
List:net.sourceforge.lists.courier-users

Brian Candler wrote:

On Thu, Jan 09, 2003 at 02:54:34PM +0100, Xavier Beaudouin wrote:

Le jeudi, 9 jan 2003, à 14:10 Europe/Paris, Sam Varshavchik a écrit :

[... snip ...]

solaris... With about > 600 000 users, so I may be don't know what I am talking about...

Look at the code for handling the cache file.

1. It opens and reads the courierpop3dsizelist file (if any)

2. For all files which are in the mailbox but not in the cache, it works out the size as before. For all files which are in the cache but not in the directory listing, they are forgotten about.

3. It then writes the updated cache to a temporary file and then does an atomic rename to 'courierpop3dsizelist'. At all instants the file is complete and valid. There is no need to lock the file. There is no race condition.

To move the temporary file, you need to delete the current courierpop3dsizelist before. In this case, what is happen if another pop3d process try to access between the delete and the move.

The file is never modified, only replaced in its entirety. That's what makes it safe.

Regards,

Brian.

_______________________________________________ courier-users mailing list cour@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users

-- (o_.' Jérôme Bolliet - DRS/Dpt Ingénierie Internet //\ Noos - 20, place des vins de france 75614 Paris Cedex 12 V_/_ Tél.: 01.44.87.52.84 Email: jbol@noos.fr (s'il n'y a pas de solution, c'est qui n'y avait pas de problème...)