Thanks Fernando. But I need to have only 1 row for a given user, date with very low latency. So none of your options work for me.
On Fri, Feb 3, 2017 at 10:34 AM, Fernando Avalos <gaval...@gmail.com> wrote: > Hi Shyla, > > Maybe I am wrong, but I can see two options here. > > 1.- Do some grouping before insert to Cassandra. > 2.- Insert to cassandra all the entries and add some logic to your > request to get the most recent. > > Regards, > > 2017-02-03 10:26 GMT-08:00 shyla deshpande <deshpandesh...@gmail.com>: > > Hi All, > > > > I wanted to add more info .. > > The first column is the user and the third is the period. and my key is > > (userid, date) For a given user and date combination I want to see only 1 > > row. My problem is that PT0H10M0S is overwritten by PT0H9M30S, even > though > > the order of the rows in the RDD is PT0H9M30S and then PT0H10M0S. > > > > Appreciate your input. Thanks > > > > On Fri, Feb 3, 2017 at 12:45 AM, shyla deshpande < > deshpandesh...@gmail.com> > > wrote: > >> > >> Hello All, > >> > >> This is the content of my RDD which I am saving to Cassandra table. > >> > >> But looks like the 2nd row is written first and then the first row > >> overwrites it. So I end up with bad output. > >> > >> (494bce4f393b474980290b8d1b6ebef9, 2017-02-01, PT0H9M30S, WEDNESDAY) > >> (494bce4f393b474980290b8d1b6ebef9, 2017-02-01, PT0H10M0S, WEDNESDAY) > >> > >> Is there a way to force the order of the rows written to Cassandra. > >> > >> Please help. > >> > >> Thanks > > > > >
