I run my mons as VMs inside of UCS blade compute nodes. Do you use the fabric interconnects or the standalone blade chassis?
Jake On Wednesday, May 13, 2015, Götz Reinicke - IT Koordinator < goetz.reini...@filmakademie.de> wrote: > Hi Christian, > > currently we do get good discounts as an University and the bundles were > worth it. > > The chassis do have multiple PSUs and n 10Gb Ports (40Gb is possible). > The switch connection is redundant. > > Cuurrently we think of 10 SATA OSD nodes + x SSD Cache Pool Nodes and 5 > MONs. For a start. > > The main focus with the blaids would be spacesaving in the rack. Till > now I dont have any prize, but that woucld count to in our decision :) > > Thanks and regards . Götz > > Am 12.05.15 um 14:50 schrieb Christian Balzer: > > > > 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 > > > > > > > -- > Götz Reinicke > IT-Koordinator > > Tel. +49 7141 969 82 420 > E-Mail goetz.reini...@filmakademie.de <javascript:;> > > Filmakademie Baden-Württemberg GmbH > Akademiehof 10 > 71638 Ludwigsburg > www.filmakademie.de > > Eintragung Amtsgericht Stuttgart HRB 205016 > > Vorsitzender des Aufsichtsrats: Jürgen Walter MdL > Staatssekretär im Ministerium für Wissenschaft, > Forschung und Kunst Baden-Württemberg > > Geschäftsführer: Prof. Thomas Schadt > >
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