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A comment on Are you sure you want to use MMAP in your database management system? [pdf]. Parent comment
> No one would think an operation on the order of nanoseconds has anything to do with writing permanent storage.
I literally just explained to you why with a file-backed mapping it is not nanoseconds but potentially an infinite time: https://news.ycombinator.com/item?id=29977672
> it has nothing at all to do with any files or filepaths.
I literally just explained to you that is doesn't have to be filepaths (and even with shm_open() POSIX standard, pedantically IT IS NOT A FILEPATH).
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> No one would think an operation on the order of nanoseconds has anything to do with writing permanent storage.
I literally just explained to you why with a file-backed mapping it is not nanoseconds but potentially an infinite time: https://news.ycombinator.com/item?id=29977672
> it has nothing at all to do with any files or filepaths.
I literally just explained to you that is doesn't have to be filepaths (and even with shm_open() POSIX standard, pedantically IT IS NOT A FILEPATH).