On Mon, Aug 3, 2015 at 5:29 PM, Wvath <p.wvath@xxxxxxxxx> wrote: > Dear John Spray, > > You made me very clear!! > > If I can get a root privilege, is it possible to beat Lustre in the same > environment ? Check out Mark's response on the "CephFS vs Lustre performance" thread on this list -- that pretty much covers it. Cheers, John > > > On Aug 3, 2015, at 19:05, John Spray <jspray@xxxxxxxxxx> wrote: > > > > On Fri, Jul 31, 2015 at 3:50 PM, Wvath Vwath <p.wvath@xxxxxxxxx> wrote: >> >> I have one cluster which I can play around for getting used to with Ceph >> command and its features this machine I have root privilege to set up Ceph >> normally, but once I want to see serious performance I will move to bigger >> cluster that has more nodes which I don't have root privilege. That why I >> needed to install it as non-root. The bigger cluster uses Lustre, so I want >> to compare perfomance. > > > OK, so I'm guessing this is an HPC cluster of some kind that you have a > non-root account on, and you want to test ceph (including performance) on > it. This is kind of a flawed idea, because without root you won't have > access to any actual block devices to put your OSDs on. Running OSDs using > a directory for storage is not what you'd call a "realistic" setup. > > I imagine you have an existing Lustre deployment, probably on properly > specified and configured hardware, so comparing an ad-hoc non-root ceph > cluster with a proper Lustre cluster would be a bogus comparison. In > fairness to Lustre, it's likely to be faster anyway, but let's at least give > ceph a fair start! To get a genuine comparison you also need to make sure > you've got appropriate hardware, e.g. SSD journals for ceph. > > Sorry to be negative, but it sounds like you really need to work on getting > root in order to run the kind of comparisons you want to. > > John > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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