Re: How to model hierarchical structure?

2010-03-06 Thread Jean-Denis Greze
This really depends on the operations you want to optimize for. What's important to you? Aggregate queries? Finding children/siblings/ancestors? Reorganizing the tree/hierarchy? For Cassandra, you really need to spend time thinking about how you'll be accessing things and design for that. If

Re: How to retrieve keys from Cassandra ?

2010-02-02 Thread Jean-Denis Greze
Ok, so 0.6's https://issues.apache.org/jira/browse/CASSANDRA-745 permits someone using RandomPartitioner to pass start= and finish= to get all of the rows in their cluster, although in an extremely inefficient way. We are in a situation like Pierre's, where we need to know what's currently in the

Re: [VOTE] Graduation

2010-01-25 Thread Jean-Denis Greze
+1 On Mon, Jan 25, 2010 at 1:11 PM, Eric Evans eev...@rackspace.com wrote: There was some additional discussion[1] concerning Cassandra's graduation on the incubator list, and as a result we've altered the initial resolution to expand the size of the PMC by three to include our active