On Wed, 26 Oct 2016, Wido den Hollander wrote:
Op 26 oktober 2016 om 15:51 schreef J David <j.david.lists@xxxxxxxxx>:
On Wed, Oct 26, 2016 at 8:55 AM, Andreas Davour <ante@xxxxxxxxxxxx> wrote:
If there are 1 MON in B, that cluster will have quorum within itself and
keep running, and in A the MON cluster will vote and reach quorum again.
Quorum requires a majority of all monitors. One monitor by itself (in
a cluster with at least three monitors) will never form a quorum.
To add, RADOS is always synchronous when writing. If min_size isn't
online or can't be reached a write will not succeed.
So in this case, the DC with just one MON and copy of OSDs remaining
will NEVER accept a write.
Good points. Thanks for pointing out that not insignificant detail.
/andreas
--
"economics is a pseudoscience; the astrology of our time"
Kim Stanley Robinson
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