On Wed, 17 Sep 2014, Cheng Wei-Chung wrote:
> Dear all:
>
> I have seen this function few days.
> OSDMap::Incremental::get_net_marked_down
>
> There is something strange I don't know why.
>
> why we increase n when we got state and previous state is UP?
> if (p->second & CEPH_OSD_UP) {
> if (previous->is_up(p->first))
> n++; // marked down
> else
> n--; // marked up
> }
>
> This function aims to help check whether the osd can be mark down or not,
> right?
>
> For counting the osd that state is down, the above function is
> counting the osd that state is up?
>
> I would like to know there is some minor error or something I don't
> really understand.
For lame historical reasons the CEPH_OSD_UP flag in the incremental
*toggles* the up/down state ... it either means the OSD came up or that it
went down.
sage
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