>>What do you mean by that? I'm talking about the KVM guest not about the >>ceph nodes. Do you have tried to compare virtio-blk and virtio-scsi ? Do you have tried directly from the host with the rbd kernel module ? ----- Mail original ----- De: "Stefan Priebe - Profihost AG" <s.priebe@xxxxxxxxxxxx> À: "Mark Nelson" <mark.nelson@xxxxxxxxxxx> Cc: "Joao Eduardo Luis" <joao.luis@xxxxxxxxxxx>, ceph-devel@xxxxxxxxxxxxxxx Envoyé: Jeudi 8 Novembre 2012 09:45:17 Objet: Re: less cores more iops / speed Am 08.11.2012 01:59, schrieb Mark Nelson: > There's also the context switching overhead. It'd be interesting to > know how much the writer processes were shifting around on cores. What do you mean by that? I'm talking about the KVM guest not about the ceph nodes. > Stefan, what tool were you using to do writes? as always: fio ;-) Stefan -- 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 -- 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
