There are n vnodes regardless of the size of the physical cluster. Regards Milind On Jun 10, 2013 7:48 AM, "Theo Hultberg" <[email protected]> wrote:
> Hi, > > The default number of vnodes is 256, is there any significance in this > number? Since Cassandra's vnodes don't work like for example Riak's, where > there is a fixed number of vnodes distributed evenly over the nodes, why so > many? Even with a moderately sized cluster you get thousands of slices. > Does this matter? If your cluster grows to over thirty machines and you > start looking at ten thousand slices, would that be a problem? I guess trat > traversing a list of a thousand or ten thousand slices to find where a > token lives isn't a huge problem, but are there any other up or downsides > to having a small or large number of vnodes per node? > > I understand the benefits for splitting up the ring into pieces, for > example to be able to stream data from more nodes when bootstrapping a new > one, but that works even if each node only has say 32 vnodes (unless your > cluster is truly huge). > > yours, > Theo >
