Re: A possibility of turning off file caching for certainoperations

[Arjan van de Ven]

On Thu, 2006-04-27 at 00:29 -0800, Artem Tashkinov wrote:
> A nice feature of emptying files and buffer cache was introduced in kernel 2.6.16 but my question is: Is it possible to turn off file caching for certain operations? E.g. I do not want the kernel to cache an ISO image which is being copied from HDD to the LAN or burned to CD.


it's called O_DIRECT and madvise()

but do you rEALLY REALLY want to disable caching? Caching, even a little
bit, is essential to get ok performance; if you disable caching it's
your responsibility to do all the things needed to get good IO
performance.

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