On Fri, Dec 5, 2014 at 4:32 PM, Robert Coli <rc...@eventbrite.com> wrote:
> On Wed, Dec 3, 2014 at 1:54 PM, Raj N <raj.cassan...@gmail.com> wrote: > >> The question is more from a multi-tenancy point of view. We wanted to see >> if we can have a keyspace per client. Each keyspace may have 50 column >> families, but if we have 200 clients, that would be 10,000 column families. >> Do you think that's reasonable to support? I know that key cache capacity >> is reserved in heap still. Any plans to move it off-heap? >> > > That's an order of magnitude more CFs than I would want to try to operate. > > But then, I wouldn't want to operate Cassandra multi-tenant AT ALL, so > grain of salt. > > =Rob > http://twitter.com/rcolidba > > I don't know if it's still true but Jonathan Ellis wrote in an old post saying there's a fixed overhead per cf. Here is the link. http://dba.stackexchange.com/a/12413. Even if it's improved since C* 1.0, I still don't feel comfortable to scale my system by creating CFs.
