Yes, you can change your task tracker startup script to use nice and ionice
and restart the task tracker process. The mappers and reducers spun off
this task tracker will inherit the niceness.
See the first comment in
http://blog.cloudera.com/blog/2011/04/hbase-dos-and-donts/
Quoting:
change the h
Hi, All...
We have a user case intended to run Mapreduce in background, while the
server serves online operations. The MapReduce job may have lower priority
comparing to the online jobs..
I know this is a different use case of Mapreduce comparing to its
originally targeted scenario (where Mapreduc
