> On 08/12/2013 06:49 PM, Dmitry Postrigan wrote: >> Hello community, >> >> I am currently installing some backup servers with 6x3TB drives in them. I played with RAID-10 but I was not >> impressed at all with how it performs during a recovery. >> >> Anyway, I thought what if instead of RAID-10 I use ceph? All 6 disks will be local, so I could simply create >> 6 local OSDs + a monitor, right? Is there anything I need to watch out for in such configuration? > I mean, you can certainly do that. 1 mon and all OSDs on one server is > not particularly fault-tolerant, perhaps, but if you have multiple such > servers in the cluster, sure, why not? This will be a single server configuration, the goal is to replace mdraid, hence I tried to use localhost (nothing more will be added to the cluster). Are you saying it will be less fault tolerant than a RAID-10? >> Another thing. I am using ceph-deploy and I have noticed that when I do this: >> >> ceph-deploy --verbose new localhost >> >> the ceph.conf file is created in the current folder instead of /etc. Is this normal? > Yes. ceph-deploy also distributes ceph.conf where it needs to go. Hmm. Here's what I do: ceph-deploy --verbose new *** Creating new cluster named ceph Resolving host *** Monitor *** at *** Monitor initial members are ['***'] Monitor addrs are ['***'] Creating a random mon key... Writing initial config to ceph.conf... Writing monitor keyring to ceph.conf... however, /etc/ceph.conf does not exist. There is an empty folder /etc/ceph, but that's it. ceph.conf only exists in the current folder where I ran ceph-deploy. The hostname I specified is of the same server I ran this on. Should I manually copy ceph.conf to /etc? Not sure if it matters, my OS is a fresh installation of centos-6 64-bit (3.10.5-1.el6.elrepo.x86_64). >> Also, in the ceph.conf there's a line: >> mon host = ::1 >> Is this normal or I need to change this to point to localhost? > You want to configure the machines such that they have resolvable 'real' > IP addresses: > http://ceph.com/docs/master/start/quick-start-preflight/#hostname-resolution Thank you. Looks like I would have to use the host name and then use iptables to prevent connections from outside. >> >> Thanks for any feedback on this. >> >> Dmitry >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> Dmitry _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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