> Or does a cassandra cluster works best with the same > hardware in every node? Things work best if the nodes all have the same HW. If you mix HW then you need to capacity plan against a machine made up of all of the lowest performing parts.
What's happening with the poor performance ? Poke around with http://spyced.blogspot.com/2010/01/linux-performance-basics.html See what's happening with nodetool tpstats ? What sort of load are the nodes under ? How much data, how much throughout ? Have you changed any of the default setting ? I would guess with a single physical spindle you may have an IO bottleneck. Hope that helps. ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 10/01/2012, at 3:42 AM, Daniel Bruegge wrote: > Hi, > > I am currently running 4 cassandra nodes with the following hardware > > - AMD Athlon 64 X2 6000+ > - 8G RAM > - 750G hard disk > > It shows not such a good writing performance and a really bad read > performance with sometimes also timeouts. I was wondering if it makes > sense to add 2 nodes with a different hardware (8 CPUs and more RAM) > to improve this. Or does a cassandra cluster works best with the same > hardware in every node? > > Thanks & best regards > > Daniel
