robin.garner at scu
Oct 12, 2009, 11:18 PM
Post #2 of 2
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Re: Trying Hard to Undrstand the Sync Daemon's Behavior
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Hi Eric,
I'm having similar problems understanding the detail of the sync
daemon's behaviour. Did you get any answers ? And where did you
eventually ask the question (I see you jumped to another list) ?
Thanks in advance,
Robin Garner
Southern Cross University
Lismore NSW, Australia
Robinson, Eric wrote:
> Okay guys, I run lvs+heartbeat+ldirectord on a pair or clustered load
> balancers (active/passive).
>
> On both the active and passive nodes, I have the following:
>
> ipvsadm --start-daemon master
> ipvsadm --start-daemon backup
>
> When I look at connection informationm using 'ipvsadm -Lcn' I see very
> strange behavior:
>
> 1. The passive/backup computer usually has MORE connections than the
> active/master.
>
> 2. The backup has DIFFERENT connections than the master. Some match,
> others do not, and there are often connections on one that are not on
> the other. I'm aware that it takes time for the connection details to
> propagate, but I've waited for minutes for connections to expire on the
> backup and they just seem to stay in there forever, even after they have
> been removed from the master.
>
> 3. A new connection shows up in the master, and moments later it shows
> up in the backup. That's great, but then a couple of minutes later it
> might DISAPPEAR from the backup, even though the client has not
> disconnected and the connection still shows in the master.
>
> I tried changing the configs as follows:
>
> On the Master:
>
> ipvsadm --start-daemon master --syncid 1
> ipvsadm --start-daemon backup --syncid 2
>
> On the Slave:
>
> ipvsadm --start-daemon master --syncid 1
> ipvsadm --start-daemon backup --syncid 2
>
> I have ALSO tried having only the active load balancer be master and
> only the passive load balancer be backup, but the behavior seems to be
> the same.
>
> Can someone tell me what I'm failing to understand about the sync
> daemon?
>
> --
> Eric Robinson
>
>
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