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

[Johann Lombardi]

On Sun, Apr 22, 2012 at 5:36 AM, Alexey Lyashkov <
alexey_lyashkov at xyratex.com> wrote:

> Why not? HCA provide a T10 checksumming when obdfilter (osd) submit a IO
> request - so it's before a call bio_done() function and before send a reply
> to client.
>
>
so we may don't want a commit as HCA verify a checksum and it's correct.
>

I was actually concerned by checksum errors when committing metadata blocks
to disk. That said, i assume that the low level driver is supposed to
resubmit the I/O several times (ideally via multipath) on checksum errors
and ultimately triggers a failover (to replay the I/O), right?

Cheers,
Johann
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