There is a server side check to ensure that all available nodes share the same schema version.
The migration will proceed though if any of the nodes are unavailable. Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 17/03/2012, at 11:07 AM, Shoaib Mir wrote: > Hi guys, > > While creating schema on our cluster today I didn't get any errors even when > some of the hosts in the cluster were unreachable (not the ones in the same > data centre but in another region). cli kept on showing all nodes agreeing > where all nodes were agreeing. > > Now after this when I did "describe cluster" I did get appropriate > "unreachable" messages for the nodes that were timing out on connections. > > Can someone please explain if at the time of schema creation does the nodes > just talk to other nodes within the DC for agreement or it has to talk to > each and every node within the whole cluster before agreeing on schema > changes? > > cheers, > Shoaib
