On Wed, Dec 3, 2008 at 4:29 PM, Tom Brown <tom at ng23.net> wrote: > >> >> Thank you for the input. Let's forget about XEN for a moment, I was >> actually looking at setting up a cluster which has fail-over & load >> balancing capabilities, regardless of what runs on it. If XEN >> enterprise is the only option,then I'm not going to bother. I don't >> see why I need to pay for a tool which has a helpdesk and >> "professional technicians standing by" to help me when I get stuck, if >> XEN can do the same. >> > > > i cant speak for others but when i talk of clusters and load balancing i > talk of different things. For load balancing i'd lean towards LVS and > for clusters then it very much depends on what you are clustering. > Application servers, databases, mail servers etc etc. For a MySQL > 'cluster' i'd probably go for master<>master depending on how many nodes > i need and the application type etc. If its application clusters then > things like tomcat can know about each other and take over if one of > them dies. I think that the point i'm trying to make is that the > solution very much depends on what you are trying to achieve, so to me > 'regardless what runs on it' is not really something to aim a good > answer at. > > As mentioned i am pretty sure that if you want to make your own 'cloud' > in todays speak then you may well be looking commercial. > > Thats just my thoughts and its most probable i am wrong. > _______________________________________________ Hi Tom, I do use MySQL clusters, but this is an application level cluster, and is limited. I would like to go further and do an OS level cluster. With DRBD, one could mirror 2 servers identical, i.e. everything on 1 server to the other, which is even better than MySQL clustering. But, DRBD only offers high-availability, i.e. if one server goes down, the other can take over. What I'm looking for, is how to build what is called a super computer. Google used to, or still even does this, where they put hundreds of computers into the same "cluster" / super computer, and end up with a 1 huge hard drive, and plenty of RAM to use :) So, my question is, how does one do this? I know that I can pay someone a LOT of money for it, but I don't have a lot of money for this. If it's not possible, I'll probably just go and purchase VMWare's grid application and use that, but I would prefer to try this myself if possible. -- Kind Regards Rudi Ahlers