[lvs-users] moving connections across real servers

Simon Horman horms at verge.net.au
Sun Feb 5 22:22:11 GMT 2012

On Sun, Feb 05, 2012 at 02:05:25PM -0500, krishna prasad wrote:
> Any feed-back on this?
> Thanks
> Prasad.
> On Fri, Feb 3, 2012 at 4:54 PM, krishna prasad
> <krishna.sirigiri at gmail.com>wrote:
> > Hi All,
> >    I was going thru the LVS documents and tutorial especially the high
> > availability features supported.As per my understanding
> > 1) When active director fails the clients with established connections
> > don't experience any connection loss, i.e. no reconnection is required.
> > (this is because that active director has synchronized the connection state
> > with backup director)
> > 2) When the real server fails, clients need to reconnect as director don't
> > move the connections to backup real server.
> >
> > Assuming that my understanding is correct, how complex or big to have a
> > feature to support moving connections of failed real server to other real
> > server?

I believe that this can be achieved by running fault tolerant real-servers,
that is two real-servers running in lock-step. Two solutions that
I am aware of that allow that to be done are Kemari and Remus, both of
which. I believe that both of those solutions work in conjunction with Xen
and that a version of Kemari for KVM is also available.

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