EMR instances are started near each other. This increases the bandwidth between nodes.
There may also be some enhancements in terms of access to the SAN that supports EBS. On Fri, Dec 24, 2010 at 4:41 AM, Otis Gospodnetic < otis_gospodne...@yahoo.com> wrote: > ----- Original Message ---- > > From: Amandeep Khurana <ama...@gmail.com> > > To: common-user@hadoop.apache.org > > Sent: Fri, December 10, 2010 1:14:45 AM > > Subject: Re: Hadoop/Elastic MR on AWS > > > > Mark, > > > > Using EMR makes it very easy to start a cluster and add/reduce capacity > as > > and when required. There are certain optimizations that make EMR an > > attractive choice as compared to building your own cluster out. Using > EMR > > > Could you please point out what optimizations you are referring to? >
