Hi, I'll test it next week to integrate it in proxmox. But I'm not sure I'll improve too much performance , until qemu will be able to use multiple iothread with multiple queue. (I think that Paolo Bonzini still working on this currently). The main bottleneck with rbd currently, is cpu usage (limited to 1 iothread by disk) I'll send a benchmark report to the ceph mailing next week. ----- Mail original ----- De: "Simon Leinen" <simon.leinen@xxxxxxxxx> À: "ceph-users" <ceph-users@xxxxxxxxxxxxxx> Envoyé: Samedi 3 Septembre 2016 19:37:50 Objet: virtio-blk multi-queue support and RBD devices? One of the new features in Qemu 2.7[1] is * virtio-blk now supports multiqueue through a "num-queues" device property. We use virtio-blk in our OpenStack cluster to expose RBD volumes to Qemu/KVM VMs. Can RBD-backed virtio-blk benefit from multiple queues? (I'm hopeful because virtio-scsi had multi-queue support for a while, and someone reported increased IOPS even with RBD devices behind those.) -- Simon. [1] http://wiki.qemu.org/ChangeLog/2.7 _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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