Re: VFS hot tracking: How to calculate data temperature?

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Here also has another question.

How to save the file temperature among the umount to be able to
preserve the file tempreture after reboot?

This above is the requirement from DB product.
I thought that we can save file temperature in its inode struct, that
is, add one new field in struct inode, then this info will be written
to disk with inode.

Any comments or ideas are appreciated, thanks.


On Fri, Nov 2, 2012 at 12:04 PM, Zhi Yong Wu <zwu.kernel@xxxxxxxxx> wrote:
> HI, guys
>
>    VFS hot tracking currently show result as below, and it is very
> strange and not nice.
>
> inode #279, reads 0, writes 1, avg read time 18446744073709551615,
> avg write time 5251566408153596, temp 109
>
> Do anyone know if there is one simpler but effective way to calculate
> data temperature?
>
> --
> Regards,
>
> Zhi Yong Wu



-- 
Regards,

Zhi Yong Wu
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