Better fault tolerance? Scalability to large data volumes? A combination of ZooKeeper based transactions and Cassandra may have better characteristics than RDBMS on these criteria. There's no question that trade-offs are involved, but as far as these issues are concerned, you'd be starting from a better vantage point than a SPOF relational database.
On Apr 26, 2010, at 10:24 AM, Mark Jones wrote: > Orthogonal in this case means “at cross purposes” Transactions can’t really > be done with eventual consistency because all nodes don’t have all the info > at the time the transaction is done. I think they recommend zookeeper for > this kind of stuff, but I don’t know why you want to use Cassandra vs a RDBMS > if you really want transactions. > > From: dir dir [mailto:sikerasa...@gmail.com] > Sent: Saturday, April 24, 2010 12:08 PM > To: user@cassandra.apache.org > Subject: Re: Does anybody work about transaction on cassandra ? > > >Transactions are orthogonal to the design of Cassandra > > Sorry, Would you want to tell me what is an orthogonal mean in this context?? > honestly I do not understand what is it. > > Thank you. > > > On Thu, Apr 22, 2010 at 9:14 PM, Miguel Verde <miguelitov...@gmail.com> wrote: > No, as far as I know no one is working on transaction support in Cassandra. > Transactions are orthogonal to the design of Cassandra[1][2], although a > system could be designed incorporating Cassandra and other elements a la > Google's MegaStore[3] to support transactions. Google uses Paxos, one might > be able to use Zookeeper[4] to design such a system, but it would be a > daunting task. > > [1] http://www.julianbrowne.com/article/viewer/brewers-cap-theorem > [2] http://www.allthingsdistributed.com/2008/12/eventually_consistent.html > [3] http://perspectives.mvdirona.com/2008/07/10/GoogleMegastore.aspx > [4] http://hadoop.apache.org/zookeeper/ > > On Thu, Apr 22, 2010 at 2:56 AM, Jeff Zhang <zjf...@gmail.com> wrote: > Hi all, > > I need transaction support on cassandra, so wondering is anybody work on it ? > > > -- > Best Regards > > Jeff Zhang > >
