Hello, I'm not familiar with Cisco UCS gear (can you cite exact models?), but somehow the thought of buying compute gear from Cisco makes me think of having too much money or very steep discounts. ^o^ That said, I presume the chassis those blades are in have redundancy in terms of PSUs (we always have at least 2 independent power circuits per rack) and outside connectivity. So from where I'm standing (I have deployed plenty of SuperMicro MicroCloud chassis/blades) I'd consider the blade a PoF and be done. What I would do (remembering the scale of your planned deployment) is to go with one dedicated MON that will be the primary (lowest IP) 99.8% of the time and 4 OSDs with MONs on them. If you want to feel extra good about this, give those OSDs a bit more CPU/RAM and most of all fast SSDs for the OS (/var/lib/ceph). Christian On Tue, 12 May 2015 14:30:58 +0200 Götz Reinicke - IT Koordinator wrote: > Hi, > > we have some space in our two blade chassis, so I was thinking of the > pros and cons of using some blades as MONs. I thought about five MONs. > > Pro: space saving in our rack > Con: "just" two blade centers. Two points of failures. > > From the redundndency POV I'd go with standalone servers, but space > could be a bit of a problem currently .... > > Waht do you think? > > Regards . Götz -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Fusion Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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