MacOS: possible data loss/corruption

[networkimprov]

fsync() on MacOS does not sync to disk; the correct sync method on MacOS is via fcntl(). Golang os.File.Sync() doesn't do this in version <= 1.11. A fix is in place for 1.12. golang/go#26650

Replace os.File.Sync calls with a direct syscall as a workaround until Go 1.12. golang/go@be10ad7

Related: golang/go#27415

[patrocinio]

Hello @networkimprov,

do you have a way to recreate this scenario?

Thanks

[networkimprov]

Since Go 1.11 is no longer supported, this issue is probably moot.

I believe demonstrating this issue entails an OS crash or unexpected power-loss, e.g. a battery failure.