Share the same file handle between multiple Erlang processes

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1

Hi guys,

What are the consequences of sharing the same file handle returned by calling file:open/2 with several processes?

Will they be able to safely access different parts of the file in parallel (with being blocked)?
Is there any caveat for doing this?

Many thanks

2

If you use a raw file handle we just pass the calls to the OS, so it will be up to the OS if it can do parallel reads/writes. You (obviously?) cannot use read/write safely, but if you use pread and pwrite I don’t see any reason why it would not work.

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