[londons_explore]

That fsync behaviour I think is a good part of the reason that apps seem to run faster/better on osx than windows/Linux.

I wish Linux and windows would have settings to change all fsyncs to barriers too.

Unfortunately I think Linux recently removed such an ability on the basis the code complexity wasn't worth it.

[Avamander]

Would it not be possible to achieve this with something akin to how libeatmydata can be LD_PRELOAD-ed?