Is there a reason you can't use time-based guids? Those would be sorted the way you wanted.
On Fri, May 7, 2010 at 8:31 PM, William Ashley <wash...@gmail.com> wrote: > > Hopefully I’ve sufficiently explained what I’m trying to do. Now on to > solving this problem in Cassandra. I’ve been trying to find a way that > allows both of the above operations to be performed efficiently. Updates are > a breeze with a structure like this: > > // Row key is userId > 12345 : { > // Column name is guid > ‘256fb890-5a4b-11df-a08a-0800200c9a66’ : { > // Column timestamp is last time guid was seen > timestamp : 387587235233 > } > } > >