I believe that reading with CL.ONE will still cause read repair to be run (in the background) 'read_repair_chance' of the time.
-Bryan On Thu, Oct 18, 2012 at 1:52 PM, Andrey Ilinykh <ailin...@gmail.com> wrote: > On Thu, Oct 18, 2012 at 1:34 PM, Michael Kjellman > <mkjell...@barracuda.com> wrote: > > Not sure I understand your question (if there is one..) > > > > You are more than welcome to do CL ONE and assuming you have hadoop nodes > > in the right places on your ring things could work out very nicely. If > you > > need to guarantee that you have all the data in your job then you'll need > > to use QUORUM. > > > > If you don't specify a CL in your job config it will default to ONE (at > > least that's what my read of the ConfigHelper source for 1.1.6 shows) > > > I have two questions. > 1. I can benefit from data locality (and Hadoop) only with CL ONE. Is > it correct? > 2. With CL QUORUM cassandra reads data from all replicas. In this case > Hadoop doesn't give me any benefits. Application running outside the > cluster has the same performance. Is it correct? > > Thank you, > Andrey >
