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How about an Infinite timeout?
----- Original Message -----
From: "Wayne" <wayne@xxxxxxxxxxxxxxx>
To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>; <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Cc: <kodland@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sent: Friday, October 05, 2001 9:28 AM
Subject: Re: LVS Timeouts
> Julian had posted answer about two years ago:
> > > > to alter this timeout value to something > 8 hours to avoid flak
from
> > > > users.
> > >
> > > On the director:
> > >
> > > ipchains -M -S 36000 0 0
> > >
> > > 36000 is 10 hours TCP timeout. man ipchains. You can try
> > > with different value.
> >
> >
>
> At 12:19 PM 10/5/2001 -0400, mack@xxxxxxxxxxxx wrote:
> >On Fri, 5 Oct 2001, Kris Odland wrote:
> >
> >> Here's whats going on. We are using LVS for load balancing imap
servers,
> >> we have the tunneling option set up so the individual servers reply to
> >> the client.
> >
> >I don't have an answer, but I do have some more questions..
> >
> >I assume all the imap realservers are writing to one common filesystem?
> >
> >> We are seeing a problem if you have your email client set up to copy
> >> sent messages to a "Sent" folder on the imap server. The client opens
> >> a seperate connection to the imap server for the sent folder.
> >
> >Is this to the same VIP:port as the first connection?
> >
> >If it's different, you could be connecting to a different realserver
> >than for the first imap connection. Is this a problem?
> >
> > The
> >> problem is if you are typing a message and you have it open for a while
> >> (20 or 30 minutes) the imap connection for the sent folder is timed
out.
> >> It tries sending it through the old connection (port) and gets "Port
> >> Unreachable" error from the imap server (not the LVS server) when it
tries
> >> copying the message to sent mail. It will re-open the connection after
a
> >> bit, but not when it is trying to to the sent mail thing.
> >
> >The tcp connection through the director will be dropped in about 15mins
> >(depending on your kernel).
> >
>
>http://www.linuxvirtualserver.org/Joseph.Mack/HOWTO/LVS-HOWTO-11.html#ss11.
30
> >
> >> It seems that after 30 minutes the imap server sends a "BYE" message
> >> because it has been idle too long, and it does an autologout for the
> >> corresponding folder. This should be followed by a FIN, and then ACK
from
> >> the client. In this case the ACK is not making it to the server, but
> >> being rejected with "Port Unreachable" messages, so the server keeps on
> >> trying to close the connection.
> >
> >I would assume this is because the director has already dropped the link
> >(look at the output of ipvsadm if you can do it with a machine and only
> >one connection and you can sit around and wait - you could reduce the
> >tcp timeout as listed above to speed things up a bit).
> >
> >
> >Joe
> >
> >--
> >Joseph Mack, mack@xxxxxxxxxxxx
> >Linux Virtual Server project
> >http://www.linuxvirtualserver.org
> >
> >
> >_______________________________________________
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> >Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> >or go to http://www.in-addr.de/mailman/listinfo/lvs-users
>
>
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