The pool will not actually go read only. All read and write requests will block until both osds are back up. If I were you, I would use min_size=2 and change it to 1 temporarily if needed to do maintenance or troubleshooting where down time is not an option.
On Thu, Feb 22, 2018, 5:31 PM Georgios Dimitrakakis <gior...@acmac.uoc.gr> wrote: > All right! Thank you very much Jack! > > The way I understand this is that it's not necessarily a bad thing. I > mean as long as it doesn't harm any data or > cannot cause any other issue. > > Unfortunately my scenario consists of only two OSDs therefore there is > a replication factor of 2 and min_size=1. > > What I am trying to figure out is if it's more dangerous to have > min_size=2 rather than 1 in the above scenario and if it gives me any > benefits. > > I am already aware of the *golden* rule about the minimum number of > replicas (3) but the cluster will be reformed soon and until then I > would like to know if it's better to go with min_size=2 or not. > > Regards, > > G. > > > If min_size == size, a single OSD failure will place your pool read > > only > > > > On 02/22/2018 11:06 PM, Georgios Dimitrakakis wrote: > >> Dear all, > >> > >> I would like to know if there are additional risks when running CEPH > >> with "Min Size" equal to "Replicated Size" for a given pool. > >> > >> What are the drawbacks and what could be go wrong in such a > >> scenario? > >> > >> Best regards, > >> > >> G. > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@lists.ceph.com > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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