[Beowulf] Transparant clustering

Serge Fonville serge.fonville at gmail.com
Fri Nov 14 00:41:16 PST 2008

Thanks for the response (and for the questions :-))
I'll try and elaborate a bit more.
I currently have two equal systems. (XEON 3220,8GB,80GB RAID1)
I want to run a couple of websites (using Tomcat) and two database servers
(PostgreSQL and MySQL)
I have contintued reading a lot and I think I am starting to have a clear
idea on what is possible
Basically I want it to appear as a single system to the outside world while
in fact there are more (currently just two).
They should divide all usage of resources equally. If one goes down the
other notices and takes over everything, if it comes up again they are
synchronized (I am aware of the split brain issue) either server has four
network interfaces and can also be connected through an RS-232 cable.
Alternatives seem to be to create a tomcat cluster, a mysql cluster and
pgcluster for clustering tomcat, but that would not be as scalable as I
would have hoped.
There are no specific requirements as to availability (one internet
connection, one switch, one power group) currently a very simple project (it
is supposed to grow bigger and larger over time)
I also tried looking into OpenSSI, kerrighed ,LinuxPMI and using heartbeat
with drbd and lvs.
All these possibilities are a bit overwhelming to start with, so I hope the
most developed project of all (which seems to be beowulf) seemed to me the
best starting point.


Serge Fonville

On Fri, Nov 14, 2008 at 9:23 AM, Bogdan Costescu <
Bogdan.Costescu at iwr.uni-heidelberg.de> wrote:

> On Wed, 12 Nov 2008, Serge Fonville wrote:
>  I have always thought that it should be possible to build a cluster which
>> works like a single system.
> Have you looked at ScaleMP ?
>  I just wonder if the head node would make things more difficult (since
>> that can go down as well).
> You have to better define your expectations of reliability and performance
> - they often go in different directions.
> --
> Bogdan Costescu
> IWR, University of Heidelberg, INF 368, D-69120 Heidelberg, Germany
> Phone: +49 6221 54 8240, Fax: +49 6221 54 8850
> E-mail: bogdan.costescu at iwr.uni-heidelberg.de
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