Re: [9fans] off topic - a good Git reference

[Charles Forsyth <charles.forsyth@gmail.com>]

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On 12 October 2015 at 17:49, Álvaro Jurado <elbingmiss@gmail.com> wrote:

> what ensures sha key is in fs.


The reason many of us are a little sceptical about it being fsync as such
preventing the data appearing
is that if the git function that writes the key does a write or pwrite,
the key will be in the file system on Plan 9: there's no need for an fsync
just to get it there.
In fact, in Linux there's no need for an fsync just to get it there: it
only matters in the case of a crash.

If the file system fails or you reset the machine, the intention of the
fsync will be frustrated, but
it shouldn't affect normal operation where no file server crash occurs.

As it happens, a wstat that changes nothing can be interpreted by a file
server to have a similar effect as fsync (see stat(5)).

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