Sanne, Prabhat and I had a chat the other day and agreed that Infinispan would be much easier to apply to a large variety of use cases if we could iterate over ordered keys given a starting point. Cassandra does this by partitioning (grouping in Infinispan speak) consecutive keys on the same node for performance reasons. I guess you could use the Query module and distributed keys for this, but I think it is a bit overkill.
Tristan On 05/14/2012 06:40 PM, Prabhat Jha wrote: > I have not used Infinispan's Query or Map/Reduce functionalities yet > because of them not being in JDG yet. Yes, we can use those to get what > I have mentioned. Query should be more straight forward and simpler than > M/R I think. But Query has dependency on Lucene and I have experienced > great pain in the past when using Lucene and FileSystem for shared storage. > > My perspective is a bit different. I am arguing for a "simpler" solution > for a problem that I find to be very common. Similar to how in > Cassandra, you can easily query based on a time range and the order you > want. > > On 05/14/2012 11:05 AM, Sanne Grinovero wrote: >> why "not using Query" ? >> >> Such features are available in core using Map/Reduce; I don't think >> that different approaches should be provided by core otherwise, there >> is enough complexity in there... >> >> Cheers, >> Sanne >> >> On 14 May 2012 16:58, Prabhat Jha<[email protected]> wrote: >>> Hi, >>> >>> In QuickTweet we needed a way to get most recent x tweets for a user or >>> on a topic. Currently we are implementing it by keeping entries in the >>> cache and updating a bounded FIFO queue in parallel. However, to get >>> most recent data or data for a given time range is a very common use >>> case specially in social media applications. It would be good to see >>> this range feature available in out of box (not using Query) in upcoming >>> Infinispan releases. Thoughts? >>> >>> I can get it started by creating a Jira unless I hear otherwise. >>> >>> Regards, >>> Prabhat >>> _______________________________________________ >>> infinispan-dev mailing list >>> [email protected] >>> https://lists.jboss.org/mailman/listinfo/infinispan-dev >> _______________________________________________ >> infinispan-dev mailing list >> [email protected] >> https://lists.jboss.org/mailman/listinfo/infinispan-dev > _______________________________________________ > infinispan-dev mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/infinispan-dev _______________________________________________ infinispan-dev mailing list [email protected] https://lists.jboss.org/mailman/listinfo/infinispan-dev
