md - cache

hi guys, i was thinking about cache insues
since md = multiple devices
could we implement a new device used for caches? (port bcache to md,
or flashcache (facebook))
something like:
mdadm --create /dev/md1 --level=cache --cache-device=/dev/XXX
--data-device=/dev/ZZZZ

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Roberto Spadim
Spadim Technology / SPAEmpresarial
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Re: md - cache

On 16 February 2011 16:01, Roberto Spadim wrote=
:
> hi guys, i was thinking about cache insues
> since md =3D multiple devices
> could we implement a new device used for caches? (port bcache to md,
> or flashcache (facebook))
> something like:
> mdadm --create /dev/md1 --level=3Dcache --cache-device=3D/dev/XXX
> --data-device=3D/dev/ZZZZ
>
> --
> Roberto Spadim
> Spadim Technology / SPAEmpresarial
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid"=
in
> the body of a message to majordomo@vger.kernel.org
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ml
>

RAM
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Re: md - cache

On 02/16/2011 05:01 PM, Roberto Spadim wrote:
> hi guys, i was thinking about cache insues
> since md = multiple devices
> could we implement a new device used for caches? (port bcache to md,
> or flashcache (facebook))
> something like:
> mdadm --create /dev/md1 --level=cache --cache-device=/dev/XXX
> --data-device=/dev/ZZZZ
>

Wny would you want to port when it works fine across different types of
block devices already, including md? At least bcache is supposed to -
and I think flashcache too.
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Re: md - cache

i don=B4t know the real history of md, but dm-cache is something simila=
r
to flashcache and bcache, i don=B4t know if they stoped in time, or jus=
t
md takes the place of dm

2011/2/16 Andre Tomt :
> On 02/16/2011 05:01 PM, Roberto Spadim wrote:
>>
>> hi guys, i was thinking about cache insues
>> since md =3D multiple devices
>> could we implement a new device used for caches? (port bcache to md,
>> or flashcache (facebook))
>> something like:
>> mdadm --create /dev/md1 --level=3Dcache --cache-device=3D/dev/XXX
>> --data-device=3D/dev/ZZZZ
>>
>
> Wny would you want to port when it works fine across different types =
of
> block devices already, including md? At least bcache is supposed to -=
and I
> think flashcache too.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid"=
in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at =A0http://vger.kernel.org/majordomo-info.html
>



--=20
Roberto Spadim
Spadim Technology / SPAEmpresarial
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