问题
Possible Duplicate:
Re-use Amazon Elastic MapReduce instance
Can I keep a launched EMR cluster running and keep submitting new jobs to it until I am done (say after a couple of days) and then shut down the cluster or do I have to lanuch my own cluster in EC2 to do so?
回答1:
Yes.
In particular, I use the CLI client. Here is a snippet from one of my scripts:
JOBFLOW_ID=`elastic-mapreduce --create --alive --name cluster --num-instances $
COUNT --hadoop-version 0.20.205 --ami-version 2.0 --plain-output --debug --log-uri $LOG_
URI`
echo "Launched --jobflow $JOBFLOW_ID"
elastic-mapreduce -j $JOBFLOW_ID --ssh
You could terminate with -j --term, issue cli commands to the master using --ssh. There is even a page in the DevGuide (which you should really read it) about adding more than 256 steps (done on a already launched instance, mind that), so its really not a huge concern.
来源：https://stackoverflow.com/questions/11006603/how-to-make-emr-to-keep-running