Hmmm... Interesting concept, but I wonder what performance gain it would provide - something like rsync uses inode mtimes to only traverse file system points that have been changed - pretty efficient, and it doesn't restrict itself to a single application. I wonder what the overhead and sequencing of access to such a change log would be compared with the existing methods...
Interesting thought though. m/ > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Lars > Holmstr�m > Sent: July 14, 2003 8:14 AM > To: [EMAIL PROTECTED] > Subject: Re: [courier-users] Disaster tolerant IMAP and SMTP ? > > > Some one pointed out that this an off-topic problem. I did some research and > got some feedback from this list and will probably build an example of a > redundant system, and this will be based on a clustered multi site file > system. > > However, I see another possible solution where courier IMAP server may have > a transaction log implemented and then one or more mailservers may > synchronize based on this log. For example, when some one logs out from the > IMAP server, the server may syncronize with the neighbours. Or by setting > synchronize_level=high one may establish a connection between all neighbours > as soon as you got a login, and then synchronize instantly. > > Maybe this is not within the scope of the courier application, but still > people may have to solve the problem and as far as I understand there are no > good solutions around ? > > /Lars > > > ----- Original Message ----- > From: "Systems Administrator" <[EMAIL PROTECTED]> > To: "Lars Holmstr�m" <[EMAIL PROTECTED]> > Cc: <[EMAIL PROTECTED]> > Sent: Monday, July 14, 2003 2:40 AM > Subject: Re: [courier-users] Disaster tolerant IMAP and SMTP ? > > > On Sat, 12 Jul 2003, Lars Holmstr�m wrote: > > > I consider building a disaster tolerant mailsystem for in and outgoing > mail. > > > > I already have two ISPs and MX records that direct incoming mailtraffic > properly. > > > > The problem seems to be the IMAP. > > > > Does any one have a suggestion for how to do this ? > > > > /Lars > > Ps. Disaster tolerant in my view is when I can afford to loose one > computerroom completely and the service from a users perspective is still > available. Ds. > > I've looked all around, but seen nothing that seems to be a > complete solution. I've documented what I've found at: > > http://www.defendmail.sunet.com.au/Projects/RedundantMail/ > > I've also got a mailing connected with this page, and have been > hoping to get some people together to discuss it, but currently I think > its just me on the mailing list. > > :) > > -- > Tim Nelson > Systems Administrator > Sunet Internet > Tel: +61 3 5241 1155 > Fax: +61 3 5241 6187 > Web: http://www.sunet.com.au/ > Email: [EMAIL PROTECTED] > > > > > > > ------------------------------------------------------- > This SF.Net email sponsored by: Parasoft > Error proof Web apps, automate testing & more. > Download & eval WebKing and get a free book. > www.parasoft.com/bulletproofapps1 > _______________________________________________ > courier-users mailing list > [EMAIL PROTECTED] > Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users > ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
