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I have two questions that to me seem related:

First, is it necessary to explicitly terminate Matlab in my sbatch command? I have looked through several online slurm tutorials, and in some cases the authors include an exit command:

http://www.umbc.edu/hpcf/resources-tara-2013/how-to-run-matlab.html

And in some they don't:

http://www.buffalo.edu/ccr/support/software-resources/compilers-programming-languages/matlab/PCT.html

Second, when creating a parallel pool in a job, I almost always get the following warning:

Warning: Found 4 pre-existing communicating job(s) created by pool that are running, and 2 communicating job(s) that are pending or queued. You can use 'delete(myCluster.Jobs)' to remove all jobs created with profile local. To create 'myCluster' use 'myCluster = parcluster('local')'

Why is this happening, and is there any way to avoid it happening to myself and to others because of me?

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2 回答 2

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这取决于您如何启动 Matlab。请注意，您的两个示例使用不同的方法来运行 matlab 脚本；第一个使用该-r选项

matlab -nodisplay -r "matrixmultiply, exit"

而第二个使用来自文件的标准输入重定向

matlab < runjob.m

在第一个解决方案中，Matlab 进程将在脚本完成后继续运行，这就是exit需要该命令的原因。在第二种解决方案中，stdin当到达文件末尾时，Matlab 进程在关闭时终止。

如果您不结束 matlab 进程，Slurm 将在达到最大分配时间时终止它，由--time您提交脚本中的选项或默认集群（或分区）值定义。

为避免您提到的警告，请确保matlabpool close在工作结束时系统地使用。如果您有多个 Matlab 实例在同一个节点上运行，并且您有一个共享的主目录，那么您可能会收到警告，因为我相信有关打开的 matlab 池的信息存储在您家中的隐藏文件夹中。重新启动可能无济于事，但找到这些文件并删除它们会（但要小心并询问系统管理员）。

于 2014-09-03T19:41:23.970 回答
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为避免您的警告，您必须删除

.matlab/local_cluster_jobs/

目录

于 2015-05-22T12:48:00.707 回答