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I need to execute a java simulation program for a very long time, many hours or maybe days, and i wish i could do it on a server. I've been heard about Cloud Computing, and i'm searching a free platform, or a very cheap one.

For example, i found Oracle Cloud, but i am open to any type of solution.

On the link there are several points to follow to deploy an application, it seems a bit complicated and you also have to install Maven.

Do you think there is a simpler solution, or that this one could be my best try?

I mean, my program consists on a few .class files, i wish i could edit/compile/run the main class very easily, like with a kind of shell or cmd. Unfortunately, i know very little about web programming, so i don't know even if this would be possible.

However, assuming i can launch my program, and log in after a very long time, will i be able to read the results? Or is it possible to write a text file to read the results later?

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  • Will your main run indefinitely, or you have to run your program in definite intervals? Commented Oct 12, 2017 at 9:02
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    Also, I would suggest AWS-Beanstalk to deploy your app (using Tomcat) Commented Oct 12, 2017 at 9:02
  • @Sridhar My main method will run indefinetily, until all calculations are done, i don't need any time of timer or scheduling Commented Oct 12, 2017 at 9:07
  • Good. You can use any server (physical/cloud) running linux. You can compile your program as a runnable jar & run the jar in background. Like, java -jar my_app.jar [parameters] & Commented Oct 12, 2017 at 9:09
  • Also, you can use screen configurations, to create a new screen, run your jar, disconnect it, and can resume anytime to see progress. Commented Oct 12, 2017 at 9:10

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i wish i could do it on a server. I've been heard about Cloud Computing

A possible solution is using AWS Lambda. You only provide your Java code in a ZIP file and it will run in a "server-less" environment. What this means is that you don't have to setup a server yourself instead AWS will manage everything for you.

i'm searching a free platform, or a very cheap one.

It's not for free, but it's pretty cheap though: https://aws.amazon.com/lambda/pricing/

However, assuming i can launch my program, and log in after a very long time, will i be able to read the results? Or is it possible to write a text file to read the results later?

I would not recommend writing it to a text file, instead look at solutions such as S3 Buckets or Elasticsearch with Kibana

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Thanks, i will give it a look!
Do you think that execution time (since seconds are calculated to pay) will be comparable to a jvm running on a "normal" laptop, or it will take much more time?
@AeternaAedes I think the lamba will be faster because your laptop will run a lot of other stuff as well which'll cost resources and the lambda probably scales to your needs
@AeternaAedes When I was learning about lambda these series helped me a lot: youtube.com/watch?v=fSUEk6iMW88 keep in mind that the UI of the lambda interface has changed so some features used in the videos are located somewhere else now

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