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Overview of security and memory management?

Hi all,

I've been looking around the documentation for an explanation of how Sage is able to sandbox user code to prevent unauthorized access to the system the platform is being hosted on. Given that Sage Notebook is deployed in production on a public server, how does the platform isolate user environments/worksheets? Furthermore, how does Sage manage memory on a per-worksheet basis?

I'd appreciate any insight from those who have deployed Sage in a production environment, either internal or external to an organization. +5 pts if you have a sys admin background!


(For what it's worth, I've been going through the thesis titled "Securing the Sage Notebook", but I'd also like some more practical input. I'll be scrounging through the dev discussion threads for an answer as well and will follow up if I come across any good explanations.)