我已经尝试了简单的Map / Reduce使用亚马逊弹性麻preduce 的任务，只花了3分钟，完成任务。是否有可能重新使用相同的实例运行其他任务。

I have tried a simple Map/Reduce task using Amazon Elastic MapReduce and it took just 3 mins to complete the task. Is it possible to re-use the same instance to run another task.

尽管我刚才使用的实例3分钟亚马逊将收取 1小时，所以我想用余额57分钟运行其他几个任务。

Even though I have just used the instance for 3 mins Amazon will charge for 1 hr, so I want to use the balance 57 mins to run several other tasks.

推荐答案

答案是肯定的。

下面是一个使用命令行客户端，你如何做到这一点：

here's how you do it using the command line client:

当你创建一个实例通过 - 活着标志，这告诉EMR保持群集的作业运行后周围

When you create an instance pass the --alive flag, this tells emr to keep the cluster around after your job has run.

然后你可以提交多个任务到集群：

Then you can submit more tasks to the cluster:

elastic-mapreduce --jobflow <job-id> --stream --input <s3dir> --output <s3dir> --mapper <script1> --reducer  <script2>

要后终止集群，只需运行：

To terminate the cluster later, simply run:

elastic-mapreduce <jobid> --terminate

尝试运行弹性-MA preduce --help看到所有可以运行的命令。

try running elastic-mapreduce --help to see all the commands you can run.

如果你没有在命令行客户端，得到它这里。

If you don't have the command line client, get it here.