Hello Fabian, > an even number is always bad for quorum based systems (6 is no better > than 5, as you can only tolerate a loss of 2 before losing quorum). > > in Ceph, additional monitors require additional resources AND generate > additional overhead (more mons -> more communication). the rule of thumb > is 3 for small to mid-sized cluster. the next step up performance wise > would be to move the 3 mons to their own stand-alone nodes, and only > once that starts to bottleneck, you increase the number to 5 and/or > upgrade the HW to become faster. for really big clusters, you can then > start splitting out the mgr instances to reduce the load further. ok, so i will turn back to only having three mon's. does this also hold for mgr's ? and: most important, can this lead to my problems ? just by having too much mon's ? thanks, marcus. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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