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If you have unlimited resources, then you will be able to
configure infinite timeout. Each connection takes a little
bit of memory. We found at 10 hours, that is already
stretching -- all the connections in last 10 hours taking
quite bit of memory. Since no one can have unlimited
resources in one computer, I don't think infinite timeout
can be done easily.
At 02:22 PM 10/5/2001 -0700, Michael McConnell wrote:
>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
>> >
>> >
>> >_______________________________________________
>> >LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
>> >Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
>> >or go to http://www.in-addr.de/mailman/listinfo/lvs-users
>>
>>
>> _______________________________________________
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>> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
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>>
>
>
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