Hi, i can confirm that in our environment we use the later option with lzo compression turned on. So far we are happy with that configuration as we see an average space saving rate of more or less 50% . greetings Stefan On Fri, Feb 18, 2011 at 6:29 PM, Gregory Farnum <gregory.farnum@xxxxxxxxxxxxx> wrote: > On Friday, February 18, 2011 at 5:30 AM, Kiran Patil wrote: > Hello, >> >> May I know when would it be possible to use the underlying btrfs >> features such as dedupe(offline) and compression for ceph cosds ? >> >> Is it possible to access btrfs features in cosd seamlessly ? > Well, there are two ways to run Ceph on btrfs. One is to give it a raw partition and tell it to set up the partition itself. I'm not sure how difficult it would be to enable these features under that situation, although I think it would be pretty simple. > The other way is to just create a btrfs filesystem and point the OSD at a directory on that filesystem as its backend storage. In that scenario you can set whatever mount options etc that you like. I'm not personally that familiar with btrfs but I imagine this should let you enable whatever options you like. :) > > -Greg > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Stefan Majer -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
