On Fri, Jan 27, 2012 at 2:35 PM, Mircea Markus <mircea.mar...@jboss.com> wrote: > I've created a JIRA to track this: https://issues.jboss.org/browse/ISPN-1801 > > I understand everybody has to have the exact same number of vnodes for > > reads and writes to hit the correct node, right ? > > Yes. > > That's true, but it is not a good thing: numVirtNodes should be proportional > with the node's capacity, i.e. more powerful machines in the cluster should > have assigned more virtual nodes. > This way we can better control the load. A node would need to send its > configured numVirtualNodes when joining in order to support this, but that's > a thing we already do for TACH. >
We should use a different mechanism than the TopologyAwareUUID we use for TACH, because the address is sent with every command. The capacity instead should be fairly static. We may want to make it changeable at runtime, but it will take a state transfer to propagate that info to all the members of the cluster (because the nodes' CHs need to stay in sync). In fact, I can imagine users wanting to balance key ownership between machines/racks/sites with TACH, but without actually using RELAY - the TopologyAwareUUID is just an overhead for them. Cheers Dan _______________________________________________ infinispan-dev mailing list infinispan-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev
