[Twg] T10 End-to-End Data Integrity HLD

[Nathan Rutman]

On Apr 17, 2012, at 11:11 AM, Alex Tomas wrote:

> On Tue, Apr 17, 2012 at 10:02 PM, Nathan Rutman
> <Nathan_Rutman at xyratex.com> wrote:
>> As far as Lustre is concerned, I view the T10 method as more of a
>> out-of-band data transfer mechanism.  When you say single framework, you
>> imply that the checksum is performed at the same point in the code path, but
>> I think that is fundamentally different between Merkle tree/ZFS (in core)
>> and T10 (in hardware).
> 
> I'd hope core Lustre just doesn't care much passing checksums down to
> specific OSD,
> which then attach them to arc buffers (like ZFS) or to BIOs (like ldiskfs) ?

That is my view as well; Lustre is just passing the protection information through.