Re: large files unnecessary trashing filesystem cache?

[Fawad Lateef <fawadlateef@gmail.com>]

On 10/19/05, Badari Pulavarty <pbadari@gmail.com> wrote:
> On Tue, 2005-10-18 at 23:58 +0200, Bodo Eggert wrote:
> > Changing a few programs will only partly cover the problems.
> >
> > I guess the solution would be using random cache eviction rather than
> > a FIFO. I never took a look the cache mechanism, so I may very well be
> > wrong here.
>
> Read-only pages should be re-cycled really easily & quickly. I can't
> belive read-only pages are causing you all the trouble.
>

I don't think the file is marked read-only ... that is when it is
accessed for reading the cache will contain the new file data and the
previous cached data will be lost .... So how u can say that read-only
pages or read-pages are not causing the problem ??

And I think the large files trashing filesystem caching problem can be
handled by the application using direct I/O or that must and might
already be managed by the file-system it-self because I think besides
application and file-system there isn't any thing present which can
detect the file currently accessing is a large file (as underlying
layer deals with blocks of data, or at block level with sectors and u
can't say what kind of data it is) ....

Is I m correct ??? or missing something ??


--
Fawad Lateef
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