Re: Clustering - how can I.......

On May 17, 7:23 am, Gremlin <not.h...@xxxxxxx> wrote:
I have 3 Vaxen clustered (alright, 2 alphas and a PersonalAlpha, but I
am still old fashioned enough to describe them as Vaxen). Their purpose
in life is to run WASD. I want the higher-availability of a cluster,
the ease of management of single UAF etc.....

So, the data source for the web server is an NFS file location stored on
a Windows (sigh) server using RAID5. All is sweetness and light, single
redundant data source and higher-availability web servers. Now, how can
I get this connected to the internet and also get any inbound connection
to hit somehting like a cluster-alias-IP address?

All this is running behind a small router which can only direct port 80
traffic to a single IP address. In the "good old days", I could have
LAT running and use a cluster alias and a terminal would connect to
whichever cluster node was available. But how can I do this with TCP/IP
- or, can I do this with TCP/IP?

What I want is to have all port 80 hit any cluster node - and I don't
have any load balancing servers to fiddle with TCP/IP after it passes
through the router.

Any thoughts appreciated - even those that (may) say it can't be done
without buying new and expensive comms equipment :(

Gremlin,

Failsafe IP would present a single IP address for the router. That
will provide "fail-over". It will not provide load balancing.

To achieve load balancing on www servers, you would need to use:

- a router that supported multiple external addresses each mapping to
a different internal IP address
- DNS entries that distribute the translation results over the
different external addresses.

- Bob Gezelter, http://www.rlgsc.com
.

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