Hi, coalesce is an operation which changes no of records in a partition. It will not touch ordering with in a row AFAIK.
On Fri, Dec 19, 2014 at 2:22 AM, Jerry Lam <chiling...@gmail.com> wrote: > > Hi Spark users, > > I wonder if val resultRDD = RDDA.union(RDDB) will always have records in > RDDA before records in RDDB. > > Also, will resultRDD.coalesce(1) change this ordering? > > Best Regards, > > Jerry > -- Regards, Madhukara Phatak http://www.madhukaraphatak.com
