I am using Annoy library that is using mmap() to load some multi-Gb files into RAM memory. The goal of using mmap() is to load the file only once in memory even when different processes need it.

Using docker, I plan to scale with multiple containers executing the same script on the same host. But the multi-Gb file should be loaded only once in RAM (which is why we use mmap()), otherwise my server will explode.

The multi-Gb file is located in a volume mounted on my containers.

But I still need to find a way to share RAM between containers so that I get the advantages of mmap().

I found this article about using the --ipc tag in docker, but I don't know if it applies to my case and how to implement it. Any help welcome.