Thanks Chris for response, I would love to try out. What would be the metric(s) that we will be use to measure if we improve thing.?
On Tue, Apr 2, 2013 at 11:24 AM, Chris Embree <cemb...@gmail.com> wrote: > I assume your talking about the I/O scheduler. Based on normal advice, > only change this if you have a "smart" device between the OS and the > Drives. A SATA controller usually qualifies. I have our DataNodes to to > NOOP to reduce the number of layers. > > As always your mileage may vary and you should do some testing on your own. > > > On Tue, Apr 2, 2013 at 1:59 PM, Patai Sangbutsarakum < > silvianhad...@gmail.com> wrote: > >> Hello Hadoopers, >> >> Is anyone ever play linux io scheduler configuration in worker nodes? >> default for centos is cfq, there are 3 more to choose from. >> I wonder if we can play with those scheduler, probably we might get >> better performance ? >> >> hope this make sense. >> Patai >> > >
