Re: [cobalt-users] Mirror

[Kris Dahl <krislists@xxxxxxxxxxxxx>]

on 4/26/00 11:22 AM, Joe Lange at jlange@xxxxxxxxxxx wrote:

> Hello my name is Joe and I have just bought 2 rack servers to place in to
> different pops with different internet T-1
> internet connections 1 is a T-1 to Genuity (GTE) and the other is to US West
> there will be a T-1 circuit between
> the two pops on a private network. The idea is to provide a mirrored servers
> for both pops with some kind of failover
> system in place so if one goes down the other server takes over the services
> for both. Has any one on this list done
> anything like this before and does anyone know what kind of software
> solutions that do mirroring  and / or  failover on a
> RAQ server please reply to  jlange@xxxxxxxxxxx any ideas on this would be
> greatly appreciated

The mirroring solution was discussed earlier today/last night in a very
similar situation.

As far as a failover device, we didn't really talk about it.

But, what I would suggest is doing a simple round-robin DNS to effectively
load balance between the two servers/connections.  This DNS will need to be
hosted at your ISP or upstream provider--you will need to be able to access
it if you have a problem.  If one of them goes down, you just remove it from
the round-robin option on the DNS server.  Obviously your TTL will have to
be very low for this to work well.

Honestly, a better way to do it would be to get multi-homed IPs and use BGP
routing, etc. so that if one fails, you just route the whole ip range across
the other connection.  You'll probably want to talk to your upstream
provider and see if they can help you with that.  You don't really need them
to be in two separate locations.

-k