[lvs-users] Question about UDP timeouts

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: [lvs-users] Question about UDP timeouts
From: Malcolm Turnbull <malcolm@xxxxxxxxxxxxxxxx>
Date: Wed, 17 Mar 2010 21:27:08 +0000
If you are load-balancing a DNS server with LVS via UDP ...
and you delete the real server from the LVS table because of a health check
ipvsadm -d

Then the current users in the connection table keep going to that server
until the 300 second UDP timeout has expired.

Now I can do a :

ipvsadm --set 0 0 30

to reduce the UDP timeout to 30 seconds, but i'd rather not set that globaly

I thought the following options may help....
echo 1 > /proc/sys/net/ipv4/vs/expire_quiescent_template
echo 1 > /proc/sys/net/ipv4/vs/expire_nodest_conn
But I'm not using persistence or quiescence....

Am I missing something?

Thanks in advance.


Malcolm Turnbull. Ltd.
Phone: +44 (0)870 443 8779
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