Re: [Qemu-devel] [RFC V7 00/11] Quorum block filter

[Zhi Yong Wu]

On Mon, Jan 21, 2013 at 10:25 PM, Benoît Canet <address@hidden> wrote:
>> I don't know if the following case can be handled correctly.
>> For example, quorum:2/3:image1.raw:image2.raw:image3.raw
>> Let us assume that some data in image2.raw and image3.raw get
>> corrupted, and the two images are now completely identical; while
>> image1.raw doesn't get corrupted. In this case, how will your vote
>> method know if which image gets corrupted and which image doesn't?
>
> It won't the reads will be corrupted on this sector.
sorry, i haven't got what it means, can you say standard english?:)

e.g, there is one words on image1.raw such as "USA is one great
country", but due to network bitflip, it is changed to "UK is one
greate country" on image2.raw and image3.raw.
the reads will not be corrupted on these sectors on different images,
how will quorum block filter determine which images are correct while
which aren't?

> That's why one must set each image on a different filer to avoid identical
> corruptions.
Since each image locates on different filer, you can't also make 100%
sure to avoid identical corruptions.

>
> Regards,
>
> Benoīt



-- 
Regards,

Zhi Yong Wu