Hi, Mika, By default, single MDS is used unless you set max_mds to a value bigger than 1. Creating more than one MDS is okay, as these will by default simply become standbys. All the standby MDS can be down as long as the master MDS(up:active) works. Thanks, yang ------------------ Original ------------------ From: "Mika c";<mika.leaf666@xxxxxxxxx>; Date: Thu, Mar 24, 2016 06:01 PM To: "ceph-users"<ceph-users@xxxxxxxx>; Subject: How many mds node that ceph need. Hi cephers, If I want to activate more than one mds node. Should ceph needs an odd number of mds ? Another question, if more than one mds activated than how many mds can lost£¿(If 3 mds node activated in the same time) Best wishes, Mika _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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