Hi, I was wondering if anybody knows any best practices of how to apply a schema migration across a cluster.
I've been reading this article: http://www.datastax.com/dev/blog/the-schema-management-renaissance to see what is happening under the covers. However the article doesn't seem to talk about concurrent write access during the migration process. I'm naively assuming that you'd need to block all writes to the cluster before the migration is started. This is would be firstly because of potential consistency issues amongst the cluster nodes. But this would also be because you'd need two versions of your app to running at the same time. Does anybody have any experience with doing this kind of thing? Cheers, Ben
