Sounds like you just want to create 2 OSDs per drive? It's OK, everyone does that :) I tested Ceph with 2 OSDs per SATA SSD when comparing it to my Vitastor, Micron also tested Ceph with 2 OSDs per SSD in their PDF and so on.
> On 23/09/2020 10:54, Marc Roos wrote: > >>> Depends on your expected load not? I already read here numerous of times >> that osd's can not keep up with nvme's, that is why people put 2 osd's >> on a single nvme. So on a busy node, you probably run out of cores? (But >> better verify this with someone that has an nvme cluster ;)) > > Did you? I just start to though about this idea too, as some devices can > deliver about twice of the > own ceph-osd performance. > > How they did it? > > I have an idea to create a new bucket type under host, and put two LV from > each ceph osd VG into > that new bucket. Rules are the same (different host), so redundancy won't be > affected, but doubling > number of ceph-osd daemons can squeeze a bit more iops from backend devices > at expense of doubling > Rocksdb size (reducing payload size) and using more cores. > > And I really want to hear all bad things about this setup before trying it. _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
