Steve,
First of all, thanks for answering my email. Basically, this is a job that I am going to do for a friend. He has a small business (dsl connections+web hosting). Basically eah server has 2 nic cards. Therefore, I was thinking about having them connected with a crossed cable or to a hub to update the backup server everytime there is a change in the main server (considering the fact that they are in the same location). They have one Bright House connection and one Verizon connection. The last one is supposed to be better than a normal DSL. Finally, what I want to accomplish is simple. If for any reason any of the servers goes down either because the ISP or a hardware failure, the other server will jump up, and there won't be any down time.
Thanks
Diego
----- Original Message -----
From: Steve <steve@szmidt.org>
Date: Friday, June 11, 2004 1:07 am
Subject: Re: [SLUG] Clustering
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> On Thursday 10 June 2004 12:56 pm, dhenao@tampabay.rr.com wrote:
> > Hi,
> >
> > Long time since I wrote down an email here. How is everybody
> doing.? I have
> > a quick question for you. I am not really familiarized with a server
> > environment, but I would like to get some input on how you will
> resolve> this issue. I have two cobalt 550. They are redhat
> systems basically...
> > They are exactly the same machines (hardware and software. I
> want to create
> > a cluster between them, but I am also considering the fact that
> if my ISP
> > goes down, no matter if I have a cluster, all my web sites will
> be down
> > too. Therefore, I have one connection from Bright House and
> another from
> > Verizon. Is there any possible way to have this two servers as a
> cluster.?> I did some research on LVS, but I am still concern
> about how the DNS tables
> > will be updated when the first server goes down and the second
> comes up
> > with a different ip.
>
> Well per my understanding you have two Brighthouse connections at
> your house.
> Unless the Verizon one is DSL. They are just reselling Brighthouse
> network.
> So if Brighthouse goes down, both of them are down.
>
> It's much more efficient to pay say $8 per month for hosting and
> have more
> than enough bandwidth (over 50G/mth). This is what I've been doing
> for the
> last year. It's more fun to have it in house, but often not very
> cost
> effective.
>
> If you want to do dns load balancing, hehe, it's going to get a
> lot worse.
> The DNS server can do f. ex. roundrobin with traffic but you need
> to be able
> to configure it as it does not normally work this way. To have
> high
> availability you need to either have a connection that is
> dedicated between
> those two so that if the network card goes down you can still
> notify the
> other. Or you have another server that monitors them.
>
> Now ISP's seldom goes down. Anyone worth his salt have multiple
> different
> connections. Your problem is more likely to be a router that gets
> hit by a
> surge and or dies for some reason, than you ISP going down.
>
> What do you really want to accomplish? What functions/services?
>
> > Some questions:
> >
> > 1. Both connections and servers are in the same location.
> > 2. Will dns update the tables knowing that the main server has a
> different> ip.? 3. Will all the services based on DNS as mail and
> web be running in
> > the new machine with the ip numbers incorrectly.? 4. How big
> ISPs have 0
> > down.? Do they have different internet providers.?
> >
> > Any help will be greatly appreciated.
> >
> > DIego
> >
> > -----------------------------------------------------------------
> ------
> > This list is provided as an unmoderated internet service by
> Networked> Knowledge Systems (NKS). Views and opinions expressed
> in messages
> > posted are those of the author and do not necessarily reflect the
> > official policy or position of NKS or any of its employees.
>
> - --
> Steve
>
> "They that would give up essential liberty for temporary safety
> deserveneither liberty nor safety."
> Benjamin Franklin
>
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> This list is provided as an unmoderated internet service by Networked
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