Thanks for the information Drew and Jonathan. Is there any difference in performance while using Pig compared to MapReduce directly on data store ? I will do the experiments with both of them though in some time.
On Fri, Jun 25, 2010 at 5:46 PM, Drew Dahlke <drew.dah...@bronto.com> wrote: > The cassandra column family input format will go over a an entire > column family sending a slice of a row into a mapper at a time. From > there there's a lot you can do. As far as how you aggregate data > together, I'd suggest experimenting with the latest version of Pig > which thankfully supports the new input format. It gives you a > SQL'esque syntax for manipulating the data and is probably the easiest > way to experiment. > > On Thu, Jun 24, 2010 at 11:01 AM, Atul Gosain <atul.gos...@gmail.com> > wrote: > > Hi > > What kind of Map Reduce support is provided for Cassandra ? > > Can i get some columns from different rows and then aggregate them up > > together. Its basically aggregation of statistics for various devices > > connected to a network manager. Is it a right kind of use case to be > > supported by MR ? > > Thanks > > Atul >
