Tim, At Workday team we are working on that, our work is for CEPH performance. Basically, moving janitor and cache to the SSD while we have backend replication in HDD. Still way too early for formal report but remind me in a couple of months. Edgar From: Tim Bell <Tim.Bell at cern.ch> Date: Friday, August 5, 2016 at 3:44 AM To: openstack-operators <openstack-operators at lists.openstack.org> Subject: [Openstack-operators] Tuning I/O with SSDs Has anyone a good recipe for improving I/O performance when the hypervisor has SSDs ? The configuration is CentOS 7 for guest and hypervisor with KVM. Tim -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20160805/8c1a0d0c/attachment.html>