Every node? I hadn't realized that. Is there a place where i can compute how much memory is being 'wasted' ? Le 21 déc. 2011 15:09, "Alain RODRIGUEZ" <arodr...@gmail.com> a écrit :
> Hi, I don't know if this will be technically possible, but I just want to > warn you about creating a lot of column families. When you will have a lot > clients, you will have a lot of column families and, if I'm right, each > column family uses memory on every node. You will run out of memory very > fast, because of the non horizontal growth of the memory usage per column > family (adding nodes won't resolve the problem, you will have to upgrade > hardware on existing nodes, which is not Cassandra's philosophy). > > I think you should use rows or columns inside your column families as much > as possible unless you have really a few clients. > > Once again, I'm not a Cassandra expert. I might be wrong :-). > > Alain > > 2011/12/21 Rafael Almeida <almeida...@yahoo.com> > >> Hello, >> >> I am evaluating the usage of cassandra for my system. I will have several >> clients who won't share data with each other. My idea is to create one >> column family per client. When a new client comes in and adds data to the >> system, I'd like to create a column family dynamically. Is that reliable? >> Can I create a column family on a node and imediately add new data on that >> column family and be confident that the data added will eventually become >> visible to a read? >> >> []'s >> Rafael >> >> >> >
