[infinispan-dev] default value for virtualNodes

[Dan Berindei]

On Fri, Jan 27, 2012 at 2:53 PM, Mircea Markus <mircea.markus at jboss.com> wrote:
>>> 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.
> so every command sends cluster, rack and machine info? That's sounds a bit redundant. Can't we just send them once with the JOIN request?

When RELAY is enabled, it actually needs the topology info in order to
relay messages between sites.
I agree that the topology info should never change, but RELAY requires
it for now so we can't avoid it (in the general case).

Cheers
Dan