[Lustre-discuss] Lustre and ext4

Mag Gam magawake at gmail.com
Fri Aug 22 17:41:29 PDT 2008


I would like to second Troy's request.



On Fri, Aug 22, 2008 at 1:04 PM, Troy Benjegerdes <hozer at hozed.org> wrote:
> On Fri, Aug 22, 2008 at 03:49:44PM +0400, Nikita Danilov wrote:
>> Mag Gam writes:
>>
>> Hello,
>>
>>  > It seems Lustre uses ext4 on its backends (OST/MDS) and I was curious
>>  > if kernel patching will be required in the future releases? I would be
>>
>> default Lustre configuration uses `ldiskfs' as a back-end file system,
>> which is a modified ext4. ldiskfs is a separate file system type and a
>> separate module, so no kernel patching is needed for it. Other parts of
>> Lustre server do require changes to the core kernel code though.
>
> I would really like to see some wiki or other evolving technical
> documentation on what changes are really requried to the core kernel
> code, and why, and what barriers there are to getting those patches
> accepted into the mainline kernel.
>



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