I think what is being discussed is copy-on-write. If the forked process doesn't write the data, there is no copy made. Many processes could read the same data without separate copies being made.

PS: I looked on the internet for a machine of this size. It is indeed possible to get a 198 GB memory machine from Dell. Maybe specialty vendors offer more memory? But even if this machine can do it, it would seem that a "hot fail" with a backup machine would be necessary. I am still thinking that this thing is so big and mission critical that an N+1 network would be better?

In reply to Re^5: Highly efficient variable-sharing among processes by Marshall
in thread Highly efficient variable-sharing among processes by cnd

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