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Personally I don't think I've ever used it in practice. I've seen a few others around here use it in long-running scripts, like a Map/Reduce, or perhaps Client Scripts that require large datasets.

I have a few fears, the first being, if my MR runs concurrently with multiple deployments, the second being how we design to define the cache, and henceforth how we call it?

I will refer you to the much smarter folks around here for those answers :slightly_smiling_face:

I tend to use `N/cache` only with M/R scripts to overcome the limitation that each stage gets its own memory space. For example, I may lazy load search results used in a `map()` stage. If the cache item hasn't been initialized it run the search, otherwise returns the result set (array).

I tend to name cache entries after the script name with a suffix.

My intent with this technique is to replace what you could otherwise just capture in a script global variable in a scheduled script.