the way mappers (or containers) and hence workers are assigned to machines is not under the control of giraph, but of the underlying hadoop environment (with different responsibilities that depend on the hadoop version, e.g. YARN). You'll have to tweak your hadoop configuration to control the maximum number of workers assigned to one machine (optimally one with multiple threads).
On Thu, Oct 23, 2014 at 5:53 PM, Charith Wickramarachchi < charith.dhanus...@gmail.com> wrote: > Hi Folks, > > I'm wondering what is the resource allocation model for Apache Giraph. > > As I understand each worker is one to one Mapped with a Mapper and a > worker can process multiple partitions with a user defined number of > threads. > > Is it possible to make sure that one worker, only process a single > partition? Also is it possible to control the worker assignment in the > cluster nodes? (Ex: Make sure only N workers runs on a single machine, > assuming we have enough resources) > > Thanks, > Charith > > > > > > > > > -- > Charith Dhanushka Wickramaarachchi > > Tel +1 213 447 4253 > Web http://apache.org/~charith <http://www-scf.usc.edu/~cwickram/> > <http://charith.wickramaarachchi.org/> > Blog http://charith.wickramaarachchi.org/ > <http://charithwiki.blogspot.com/> > Twitter @charithwiki <https://twitter.com/charithwiki> > > This communication may contain privileged or other confidential information > and is intended exclusively for the addressee/s. If you are not the > intended recipient/s, or believe that you may have > received this communication in error, please reply to the sender indicating > that fact and delete the copy you received and in addition, you should > not print, copy, retransmit, disseminate, or otherwise use the > information contained in this communication. Internet communications > cannot be guaranteed to be timely, secure, error or virus-free. The > sender does not accept liability for any errors or omissions > -- Claudio Martella
