As stated in my previous answer data corruption on the wire is ensured by
the ethernet CRC32 checksum
http://en.wikipedia.org/wiki/Error_detection_and_correction#Internet
If the corruption of data happens before the ethernet stack is reached on
the wire nor iSCSI neither aoe can do something about that. Although I
don't know ZFS, I guess in this case the data protection you're talking
about should apply.
But don't take my word for it... keep on digging.
Regards, Alex.
2013/4/6 PongráczI <pongra...@pongraczistvan.homelinux.com>
>
>
>
> ----------------eredeti üzenet-----------------
> Feladó: "Alexandre" <alxg...@gmail.com>
> Címzett: "PongráczI" <pongra...@pongraczistvan.homelinux.com>
> CC: "aoetools-discuss lists.sourceforge.net" <
> aoetools-discuss@lists.sourceforge.net>
> Dátum: Sat, 6 Apr 2013 10:24:10 +0100
> ----------------------------------------------------------
>
>
> I am not sure to understand against which type of error you want a
> protection/detection of.
>
> *Are you talking about corruption of data during the the transport over
> the wire?*
>
> Can you find the name of the feature implemented in iscsi you'd like to
> check for in aoe?
>
>
> regards, Alex
>
>
>
>
> Hi,
>
>
> Thank you for your feedback! I try to explain my question in a better way
> :)
>
> So, your first question is exactly my question: *Are you talking about
> corruption of data during the the transport over the wire? *Yes.
>
> On the client side, I want to write to the disk a data, for example a
> binary data: 01111000001111100001111 I want to be sure, on the server
> side it will be written to the disk the same data: 01111000001111100001111
>
> At this moment, I do not know, if an electrical noise or whatever will
> alter the data sent trough the wire, how will layer 2 and AoE handle that
> situation?
>
> For example I wrote 'piano' on the client, but 'violin' will be written to
> the disk on the server, due to the corruption during the transport over the
> wire happens. Is that possible to get this kind of corruption, or
> layer2+AoE can catch this situation and can fix this kind of issues?
>
> I use ZFS filesystem, it uses end-to-end data protection by using extra
> checksum to every block written to the disk. This can provide very good
> data protection, but would be nice to know, using AoE will not cause
> corruption in a SAN environment. Others, who use iscsi, always tell me,
> iscsi has checksum to detect transfer issues, while AoE has no this kind of
> protection, so, to get data corruption can happen and will be not detected.
> In fact, I never used iscsi, due to that comparing to AoE it is much more
> complicated and I saw several people had issues to get it running on their
> environment. AoE just works.
>
> Thank you!
>
> István
>
>
>
>
>
>
> For example,
>
------------------------------------------------------------------------------
Minimize network downtime and maximize team effectiveness.
Reduce network management and security costs.Learn how to hire
the most talented Cisco Certified professionals. Visit the
Employer Resources Portal
http://www.cisco.com/web/learning/employer_resources/index.html
_______________________________________________
Aoetools-discuss mailing list
Aoetools-discuss@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/aoetools-discuss
