Re: inflated bandwidth numbers with buffered I/O

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On 15 January 2016 at 16:09, Dallas Clement <dallas.a.clement@xxxxxxxxx> wrote:
>
> I suspected that might be the case.  Is this dirty memory on the
> client side where fio is running or on the target host where the data
> has been written to?

It will be on the client side - you aren't waiting for anything to
flush so it can even just queue in the kernel's page cache.

> I would like to make fio sync in a similar fashion to what real
> applications would do.  Setting sync=1 is probably too aggressive.
> Probably a sync after a given number of blocks would seem more
> realistic.

Try taking a look at the fsync parameter in the HOWTO:
https://github.com/axboe/fio/blob/fio-2.3/HOWTO#L909 .

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