how to keep variables that share all node processes in node cluster?

Question

It seems like all the node woker processes are working as if it is executing a new copy of the same application. But would like to keep some variables that are shared by all nod

Answer 1

If you're looking to share things on a read-only basis, check out mmap-object. I use it for large in-memory lookup tables.

Checking just now on a server, a 346M file is taking up a total of 156M of memory (mmap only pages in what's accessed) and mmap-object sharing it among 44 processes for a per-process overhead of 3.5M.

Because it's read-only I don't have to worry about inter-process locking and the messiness that can bring along.