Linux/perl mmap performance

Question

I\'m trying to optimize handling of large datasets using mmap. A dataset is in the gigabyte range. The idea was to mmap the whole file into memory, allowing multiple processes t

Answer 1

See Wide Finder for perl performance with mmap. But there is one big pitfall. If your dataset will be on classical HD and you will read from multiple processes, you can easily fall in random access and your IO will fall down to unacceptable values (20~40 times).