You can place each of the 4 new nodes exactly in the middle of 2 of the current nodes. This way each node will still be responsible for the same amount of data but your old nodes did not move.
On Mon, Sep 5, 2011 at 2:56 PM, amulya rattan <talk2amu...@gmail.com> wrote: > Ah, missed that. Thanks for the pointer. > While we are at it, the doc says that if I am doubling the strength of my > cluster, and I assign calculated tokens to the new nodes, i don't need to do > the nodetool move for old nodes. Won't I have to assign the old nodes with > their new respective tokens too? If I had 4 nodes and I add 4 more, the > token distribution for each node changes. Then how could I get away with not > assigning old nodes with new tokens? > ~Amulya > > On Mon, Sep 5, 2011 at 4:12 AM, Sylvain Lebresne <sylv...@datastax.com> > wrote: >> >> Have you done step 6 of the 'To add nodes to a Cassandra cluster' of >> http://www.datastax.com/docs/0.8/operations/clustering#adding-capacity, >> aka, run nodetool cleanup on the previously existing nodes ? >> >> -- >> Sylvain >> >> On Sun, Sep 4, 2011 at 11:58 AM, amulya rattan <talk2amu...@gmail.com> >> wrote: >> > Hi there, >> > I had a 3 nodes ring, added a 4th one, and moved others to appropriate >> > tokens..doing nodetool ring shows: >> > 127.0.0.1 datacenter1 rack1 Up Normal 348.82 MB >> > 25.00% 0 >> > 127.0.0.2 datacenter1 rack1 Up Normal 349.81 MB >> > 25.00% 42535295865117307932921825928971026432 >> > 127.0.0.3 datacenter1 rack1 Up Normal 437.04 MB >> > 25.00% 85070591730234615865843651857942052864 >> > 127.0.0.4 datacenter1 rack1 Up Normal 261.74 MB >> > 25.00% 127605887595351923798765477786913079296 >> > Although it shows 25% on all nodes, the data distribution seems totally >> > unbalanced, how did that happen? >> > Also if I happen to have a thousand node cluster, and add another 100 >> > nodes, >> > is it ok to start moving all nodes to their respective new tokens >> > simultaneously or one-by-one? >> > Any response is appreciated. >> > ~Amulya > >
