On Wed, Jun 23, 2010 at 4:51 AM, aaron morton <aa...@thelastpickle.com>wrote:
> I've been playing with something like CAS, it's not the same but it may be > of interest. > > I write some data into Cassandra with quorum or better consistency, that > allows me to assert what it should look like when read back. If the > assertion holds I can then go ahead. > This may work for your use cases, but fwiw, I would not consider this a "safe" alternative to CAS. CAS says "I have version 1 of the data, and want to update it, but only if version 1 is still the latest version." During failure conditions I don't think there's _any_ way to implement CAS without making Cassandra potentially fail during writes since you'll have to read before a write operation. Mike
