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On Wed, Apr 02, 2003 at 10:13:44PM +0100, Malcolm Turnbull wrote:
>
> Howdy,
>
> I've got a client with 4 iis servers behind LVS & Ldirectord.
> checktime = 10
> checktimeout = 5
> And his servers keep on getting taken on & offline... :-(
> I've asked him to increase settings to 20/10 to see what happens
> but has anyone else needed to increase the settings this high ?
>
>
>
> [Wed Apr 2 21:56:12 2003|ldirectord] Quiescent real server:
> 209.189.52.228:80 (4 x 209.189.52.240:80) (Weight set to 0)
> [Wed Apr 2 21:56:22 2003|ldirectord] Restored real server: 209.189.52.228:80
> (3 x 209.189.52.240:80) (Weight set to 100)
> [Wed Apr 2 21:56:42 2003|ldirectord] Quiescent real server:
> 209.189.52.228:80 (4 x 209.189.52.240:80) (Weight set to 0)
> [Wed Apr 2 21:57:02 2003|ldirectord] Restored real server: 209.189.52.228:80
> (3 x 209.189.52.240:80) (Weight set to 100)
> [Wed Apr 2 21:57:12 2003|ldirectord] Quiescent real server:
> 209.189.52.228:80 (4 x 209.189.52.240:80) (Weight set to 0)
> [Wed Apr 2 21:57:22 2003|ldirectord] Restored real server: 209.189.52.228:80
> (3 x 209.189.52.240:80) (Weight set to 100)
>
> Current load is approx. 1600 active connections per real server. The real
> servers themselves are all around 33% average CPU use. Uptime on the load
> balancer reports: 0.00, 0.00, 0.00 (no real load at all).
Hi Malcolm,
that is very strange and obviously is something that shouldn't be
happening. The only time that I have seen behaviour like that before
is in a situation where the Real Servers where under extreme load.
I think that your idea To extend the checktime and checktimeout
is sounds. However I am curious to know if you think that
the Real Servers are genuinely taking more than 5 seconds to
respond or if ldirectord is spinning out of control for some reason.
If it is indeed a resopnse time problem with the Real Servers
then you may want to consider setting checktype to connect
rather than negotiate. I would imagine this effected less by
a Real Server that is responding slowly for some reason.
--
Horms
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