You can't, you typically need to add a whole new datacenter, replicate your data and traffic there, and decommission the old one
-- Jeff Jirsa > On Aug 22, 2017, at 8:56 AM, techpyaasa . <techpya...@gmail.com> wrote: > > How can I decrease tokens for existing nodes? > Doesn't it create problem? > > > On Aug 22, 2017 7:22 PM, "Vladimir Yudovin" <vla...@winguzone.com> wrote: > Probably decreasing tokens number can help to mange big cluster? > > Best regards, Vladimir Yudovin, > Winguzone - Cloud Cassandra Hosting > > > ---- On Mon, 21 Aug 2017 19:38:37 -0400 Eduard Tudenhoefner > <eduard.tudenhoef...@datastax.com> wrote ---- > > We've been doing successful testing with multi-DC setups and 500 nodes per > DC. However, I agree with Jon here. Certain things are easier/faster with > e.g. 5x100 node clusters than 1x500 node cluster. > > Cheers > > On Mon, Aug 21, 2017 at 10:16 AM, Jon Haddad <jonathan.had...@gmail.com> > wrote: > As far as I know, those 75K nodes are not in a single cluster. If memory > serves correctly (and this article seems to indicate that it does > http://www.techrepublic.com/article/apples-secret-nosql-sauce-includes-a-hefty-dose-of-cassandra/), > you’ll see clusters of 1,000 nodes. > > Things start to get a little hairy once you go above a couple hundred nodes. > I would rather run 5 100 node clusters than a single 500 node cluster. In > theory, once you’ve built out the tooling to manage 2 clusters you should be > able to apply it to manage 20 (reality always gets in the way though…) > > Jon > > On Aug 21, 2017, at 9:15 AM, techpyaasa . <techpya...@gmail.com> wrote: > > Thanks lot for reply :) > > On Aug 21, 2017 6:44 PM, "Vladimir Yudovin" <vla...@winguzone.com> wrote: > > Actually there are clusters of thousandths nodes: Some of the largest > production deployments include Apple's, with over 75,000 nodes storing over > 10 PB of data > > Best regards, Vladimir Yudovin, > Winguzone - Cloud Cassandra Hosting > > > ---- On Mon, 21 Aug 2017 08:35:37 -0400 techpyaasa . <techpya...@gmail.com> > wrote ---- > > Hi > > Is there any limit on having number of nodes in c* cluster. > Right now we have c*-2.1.17 cluster with 3 DCs each DC with 3 groups & each > group has 21 nodes. > > We wanted to increase the cluster capacity by adding 6 nodes per group as > many of nodes disk usage crossed 65%. > > So just wanted to clarify is there any limit/drawback having huge cluster/too > many nodes in a c* cluster > > Thanks in advance > TechPyaasa > > > > > > >
