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POAzure Worker Role Design
 

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  1. POAzure Worker Role Design
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    <p>I am trying to design an azure worker role routine. A worker role polls a job queue. For each job, required number of threads is specified in the job message. A job is running an instance of an executable. Example: name of the executable is Rax.exe. Rax.exe can run on different number of threads. If we call it as Rax.exe -T 2 it will create two threads. So we do not have to deal with how to create threads. We just call Rax.exe with the appropriate commandline argument. I have Extra-Large worker instances. So, I can run 8 threads simultaneously. I want to utilize the workers as much as I can. We may have many jobs, each having different number of threads specified.</p> <p>Example:</p> <pre><code>Job Queue: 1 Rax.exe -T 3 2 Rax.exe -T 5 3 Rax.exe -T 1 4 Rax.exe -T 8 5 Rax.exe -T 4 </code></pre> <p>In this example, we have 5 jobs. A worker reads the first message and starts the job. This job consumes 3 threads. A worker can have 8 threads so the remaining 5 threads can be utilized by running another job from the queue.</p> <p>Currently, I do not know how to run multiple processes inside of a worker role. I am using waitForExit method of the process class. Each running instance of the executable creates output files so I have to collect those generated files.</p> <p>My Questions:</p> <p>1- How can I start multiple processes asynchronously and be notified when they exit? I have to do this while still polling the job queue. 2- Is this kind of job scheduling a hard problem? Can anyone come up with a good heuristic?</p> <p>EDIT: I think, estimating required running time for each job will be helpful. This kind of information exist. With this information, can it be solved?</p>
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    1. COCould you explain why you are creating extra processes instead of using the Parallel Task API? This sounds like a perfect fit for it.
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      1. POAzure Worker Role Design
      1. USErno de Weerd
 

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