> > In-memory storage:
> > All data stored in each data node is kept in memory on the node's
> > host computer. For each data node in the cluster, you must have
> > available an amount of RAM equal to the size of the database times
> > the number of replicas,
> 
> This refers to the first line: "In-memory storage". Of course you can't 
> do that with 160GB DBs. You can still cluster - look at DRBD 
> http://www.drbd.org/

I guess the relevant point for this thread is that I don't necessarily think
that this is the silver bullet as implied.  Even if you use a
high-availability clustering technology that can mirror writes and reads, you
are STILL dealing with the possibility of a database that is just massive. 
Processing this size of database will still be disk-bound unless you have an
unheard-of amount of memory; I don't think there's any reason to think that
clustering the problem will make it go away.

So I still wonder if anyone has any musings on my earlier questions?



                
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