I've not run it myself, but upgrading is part of the design. Cheers
----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 1/11/2012, at 10:43 AM, Wei Zhu <wz1...@yahoo.com> wrote: > I heard about virtual nodes. But it doesn't come out until 1.2. Is it easy to > convert the existing installation to use virtual nodes? > > Thanks. > -Wei > > From: aaron morton <aa...@thelastpickle.com> > To: user@cassandra.apache.org > Sent: Wednesday, October 31, 2012 2:23 PM > Subject: Re: Benifits by adding nodes to the cluster > >> I have been told that it's much easier to scale the cluster by doubling the >> number of nodes, since no token changed needed on the existing nodes. > Yup. > >> But if the number of nodes is substantial, it's not realistic to double it >> every time. > See the keynote from Jonathan Ellis or the talk on Virtual Nodes from Sam > here > http://www.datastax.com/events/cassandrasummit2012/presentations > > virtual nodes make this sort of thing faster and easier > > >> How easy is to add let's say 3 additional nodes to the existing >> 10 nodes? > In that scenario would would need to move every node. > But if you have 10 nodes you probably don't want to scale up by 3, I would > guess 5 or 10. Scaling is not something you want to do every day. > > How easy the process is depends on the level of automation in your > environment. For example Ops Centre can automate rebalancing nodes. > > Cheers > > > ----------------- > Aaron Morton > Freelance Developer > @aaronmorton > http://www.thelastpickle.com > > On 31/10/2012, at 7:14 AM, weiz <wz1...@yahoo.com> wrote: > >> One follow up questions. >> I have been told that it's much easier to scale the cluster by doubling the >> number of nodes, since no token changed needed on the existing nodes. >> But if the number of nodes is substantial, it's not realistic to double it >> every time. How easy is to add let's say 3 additional nodes to the existing >> 10 nodes? I understand the process of moving around data and delete unused >> data. Just want to understand from the operational point of view, how >> difficult is that? We are in the processing of evaluating the nosql >> solution, one important consideration is the operation cost. Any real world >> experience is very much appreciated. >> >> Thanks. >> -Wei >> >> >> >> -- >> View this message in context: >> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html >> Sent from the cassandra-u...@incubator.apache.org mailing list archive at >> Nabble.com. > > >
