> ---------- Forwarded message ---------- > From: Graeme Fowler <[EMAIL PROTECTED]> > To: "LinuxVirtualServer.org users mailing list." > <[email protected]> > Date: Mon, 14 Apr 2008 10:05:59 +0100 > Subject: Re: [lvs-users] Decreasing the number of backup nodes!! > Visham > > On Fri, 2008-04-11 at 15:34 +0400, Ramsurrun Visham wrote: > > I wanted some opinion on the following: > > You'd probably get a faster response (perhaps) on the Keepalived mailing > list where this is a bit more relevant, so I'm copying it to that list > too. > > > In a Keepalived failover configuration, we normally have an master > > node and a backup node. Normally, we have a backup node for each > > master node. Is their a way to decrease the number of backup nodes > > required? > > Well, yes, I guess. > > > I made a backup node be part of 3 different vrrp_sync_groups with > > three different master nodes. It did work but I wanted to know if this > > is recommended and if there is a better way to achieve this? Can > > Keepalived parameters be changed dynamically, i.e. w/o having to stop > > Keepalived, change the .conf file and then re-start the application? > > One thing to be aware of is that if you have a single backup node and > three master nodes, the master nodes *must* only handle 33% at peak of > the traffic the backup node is capable of handling. If you failed over > all three masters with a traffic rate exceeding that which the backup > node can handle, then it *will* fail (at least in terms of connections > being dropped, congestion and so on). > > When you say "keepalived parameters", what do you mean? VRRP settings? > LVS settings? Health check settings? Something else? > > Graeme
Dear Graeme, many thx for the reply.. > When you say "keepalived parameters", what do you mean? VRRP settings? > LVS settings? Health check settings? Something else? > By Keepalived parameters I meant changing, for example the value of the priority field in a vrrp_instance while keepalived is running. Are there any console commands to do so or do I have to stop keepalived, change the .conf file manually and then re-start Keepalived? Warm regards, Visham _______________________________________________ LinuxVirtualServer.org mailing list - [email protected] Send requests to [EMAIL PROTECTED] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
