[Lustre-devel] clio layer & portability

[Nikita Danilov]

On 22 July 2010 23:07, Ken Hornstein <kenh at cmf.nrl.navy.mil> wrote:
>>Yes, page index is a number a page has in a file that is divided in
>>equally sized pages. One subtlety here is that a file (something that
>>can be open(2)-ed) is striped over "stripe objects" and these also
>>consist of pages. CLIO page is "layered": it binds together a file
>>page and corresponding stripe object page.
>
> Okay ... so, I take it the stripe objects are the reason for the
> "parent" argument to cl_page_find0()?  I will confess that was always
> a puzzler.

Exactly.

>
> If anyone at Oracle could dig up that text document about CLIO that Nikita
> is referring to, that sure would be helpful!  Although the presentation that
> Alexey referrs to certainly is useful.
>
> Thanks for everyone's help!  This has certainly been useful.

Don't hesitate to ask.

>
> --Ken
>

Nikita.