> Also, Does cassandra support counters? Digg's article said they are going to > contribute their work to open source any idea when that would be? >
All of the custom work has been pushed upstream from Digg and continues. We have a few operational tools we will be releasing that will go into contrib/. I would say Counters w/ vector clocks should have some jira patches in few weeks. We have someone full-time working on that. > Thanks in advance for sharing your experience > > Lenin > > > > On Fri, Mar 19, 2010 at 1:03 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > Jeff Hodsdon edited the new link in: > http://about.digg.com/blog/looking-future-cassandra > > On Fri, Mar 19, 2010 at 2:49 PM, Nathan McCall <n...@vervewireless.com> wrote: > > Gary, > > Did you see this larticle linked from the Cassandra wiki? > > http://about.digg.com/node/564 > > > > See http://wiki.apache.org/cassandra/ArticlesAndPresentations for more > > examples like the above. In general, you structure your data according > > to how it will be queried. This can lead to duplication, but that is > > one of the trade-offs for performance and scale. > > > > Digg folks - the "Looking to the Future with Cassandra" linked on the > > wiki is no longer available. I found that article quite helpful > > originally. Is there a chance this could be re-posted? > > > > Cheers, > > -Nate > > > > On Fri, Mar 19, 2010 at 12:16 PM, Gary <daxia...@gmail.com> wrote: > >> I am a newbie to bigtable like model and have a question as follows. Take > >> Digg as an example, I want to find a list users who dug a URL and also want > >> to find a list of URLs a user dug. How should the data model look like for > >> the queries to be efficient? If I use the username and the URL for two > >> rows, > >> when a user digs a URL, I will have to update two rows so I need a > >> transaction to keep data consistent. > >> Any thoughts? > >> Thanks, > >> Gary > > > > > > -- > twitter: leningali > skype: galilenin > Cell:513.382.3371