Hi John I don't know if there is a Hadoop support for such thing, but You can do this easily writing a crontab script. It could start hadoop at specified hour and shut it down ( disable some nodes) at another one.
There can be some problems with HDFS however ( if you disable all the nodes holding replicas of some blocks, the files will become inaccessible) Piotr 2009/5/19 John Clarke <clarke...@gmail.com> > Hi, > > I am working on a project that is suited to Hadoop and so want to create a > small cluster (only 5 machines!) on our servers. The servers are however > used during the day and (mostly) idle at night. > > So, I want Hadoop to run at full throttle at night and either scale back or > suspend itself during certain times. > > Is it possible to do this? I've found very little information on it. > > Thanks for your help! > John >
