Re: [Qemu-block] [PATCH v9 2/3] quorum: implement bdrv_add_child() and bdrv_del_child()

[Alberto Garcia]

On Fri 25 Dec 2015 10:22:55 AM CET, Changlong Xie wrote:
> @@ -875,9 +878,9 @@ static int quorum_open(BlockDriverState *bs, QDict 
> *options, int flags,
>          ret = -EINVAL;
>          goto exit;
>      }
> -    if (s->num_children < 2) {
> +    if (s->num_children < 1) {
>          error_setg(&local_err,
> -                   "Number of provided children must be greater than 1");
> +                   "Number of provided children must be 1 or more");
>          ret = -EINVAL;
>          goto exit;
>      }

I have a question: if you have a Quorum with just one member and you add
a new one, how do you know if it has the same data as the existing one?

In general, what do you do to make sure that the data in a new Quorum
child is consistent with that of the rest of the array?

Berto