There is no support for a feature like that, and i doubt it would ever be supported. For one there there are no locks during a write, so it's not possible to definitively say there are 100 columns at a particular instance of time.
You would need to read all columns and delete the ones you no longer need. You could also try Redis. Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 19 Jul 2011, at 03:22, JKnight JKnight wrote: > Dear all, > > I want to keep only 100 column of a key: when I add a column for a key, if > the number column of key is 100, another column (by order) will be deleted. > > Does Cassandra have setting for that? > > -- > Best regards, > JKnight
