Why rename the keyspace? If it was me I'd just give it a name that includes the date or some identifier and include that logic in my app. That's way easier. On Wed, Jan 27, 2016 at 6:49 AM Jean Tremblay < jean.tremb...@zen-innovations.com> wrote:
> Hi, > > I have a huge set of data, which takes about 2 days to bulk load on a > Cassandra 3.0 cluster of 5 nodes. That is about 13 billion rows. > > Quite often I need to reload this data, new structure, or data is > reorganise. There are clients reading from a given keyspace (KS-X). > > Since it takes me 2 days to load my data, I was planning to load the new > set on a new keyspace (KS-Y), and when loaded drop KS-X and rename KS-Y to > KS-X. > > Now I know "renaming keyspace" is a functionality which was removed. > > Would this procedure work to destroy an old keyspace KS-X and rename a new > keyspace KS-Y to KS-X: > > 1) nodetool drain each node. > 2) stop cassandra on each node. > 3) on each node: > 3.1) rm -r data/KS-X > 3.2) mv data/KS-Y data/KS-X > 4) restart each node. > > Could someone please confirm this? I guess it would work, but I’m just > afraid that there could be in some system table some information that would > not allow this. > > Thanks for your help. > > Cheers > > Jean
