I know Pig optimizes single input and multiple group-bys with one MR job. I just want to know if this scheme applies to multiple cube-bys and rollups also.
Best regards, Ey-Chih Chow On Tue, Mar 11, 2014 at 11:47 AM, Pradeep Gollakota <[email protected]>wrote: > I forgot to mention that there are also other 3rd party libraries that make > examining the physical plan easier. For example take a look at > Lipstick<https://github.com/Netflix/Lipstick>from Netflix. > > > On Tue, Mar 11, 2014 at 11:41 AM, Pradeep Gollakota <[email protected] > >wrote: > > > Best way to examine this is to use the EXPLAIN operator. It will show you > > the physical MapReduce plan and what features are being executed in each > > phase. > > > > > > On Tue, Mar 11, 2014 at 11:29 AM, ey-chih Chow <[email protected]> wrote: > > > >> Hi, > >> > >> I got a question on a pig script that has a single input with multiple > >> group-bys and cube-bys. Will Pig use one or multiple MR job(s) to > process > >> this script? Thanks. > >> > >> Best regards, > >> > >> Ey-Chih Chow > >> > > > > >
