You may get more updated information from folks at Yahoo!, but here is a
mail on hadoop-general mailing list that has some statistics:
http://www.mail-archive.com/general@hadoop.apache.org/msg05592.html
Please note it is a little dated, so things should be better now :-)
Thank
hemanth
On Tue,
Hi,
This issue issues.apache.org/jira/browse/MAPREDUCE-2911 talks about
executing hadoop and MPI on the same cluster.Even though the comments
suggest Ralph has finished writing the code, am not able to find the patch.
Can someone guide me towards finding the same?
--
Regards,
R.V.
Hi,
I read from documents that in MapReduce, the reduce tasks only start
after a percentage (by default 90%) of maps end. This means that the
slowest maps can delay the start of reduce tasks, and the input data
that is consumed by the reduce tasks is represented as a batch of
data. This means
Hi Pedro,
Yes, Hadoop Streaming has the same property. The reduce method is not
called until the mappers are done, and the reducers are not scheduled
before the threshold set by mapred.reduce.slowstart.completed.maps is
reached.
On Tue, Jan 15, 2013 at 3:06 PM, Pedro Sá da Costa
