You could also consider snowflake: http://github.com/twitter/snowflake
which gives you ids that roughly sort by time (but aren't sequential). -ryan On Thu, Feb 3, 2011 at 11:13 AM, Matthew E. Kennedy <matt.kenn...@spadac.com> wrote: > Unless you need your user identifiers to be sequential for some reason, I > would save yourself the headache of this kind of complexity and just use > UUIDs if you have to generate an identifier. > > On Feb 3, 2011, at 2:03 PM, Aklin_81 wrote: > >> Hi all, >> To generate new keys/ UserIds for new users on my application, I am >> thinking of using a simple synchronized counter that can keep track of >> the no. of users registered on my application and when a new user >> signs up, he can be allotted the next available id. >> >> Since Cassandra is eventually consistent, Is this advisable to >> implement with Cassandra, but then I could also use stronger >> consistency level like quorum or all for this purpose. >> >> >> Please let me know your thoughts and suggesttions.. >> >> Regards >> Asil > > -- @rk
