Steve, Is the input file splittable?
Justin On Fri, Oct 14, 2011 at 11:23 AM, Steve Lewis <lordjoe2...@gmail.com> wrote: > I have an MR task which runs well with a single input file or an input > directory with dozens of 50MB input files. > When the data is in a single input file of 1 GB of more the mapper never > gets to 0%. There are not errors but when I look at the cluster, the CPUs > are spending huge amounts of time in a wait state. The job runs when the > input is 800MB and can complete even with a number of 500MB files as input. > The cluster (0.02) has 8 nodes - 8 cpu per node. Block size is 64MB. > Any bright ideas > > -- > Steven M. Lewis PhD > 4221 105th Ave NE > Kirkland, WA 98033 > 206-384-1340 (cell) > Skype lordjoe_com > > >
