Yes but those 'changes' can be relayed via the kernel rbd driver not? Besides I don't think you can move a rbd block device being used to a different pool anyway. On the manual page [0] there is nothing mentioned about configuration settings needed for rbd use. Nor for ssd. They are also using in the example the virtio/vda, while I learned here that you should use the virtio-scsi/sda. [0] http://docs.ceph.com/docs/master/rbd/libvirt/ -----Original Message----- From: Janne Johansson Subject: Re: rbd ssd pool for (windows) vms Den ons 1 maj 2019 kl 23:00 skrev Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx>: Do you need to tell the vm's that they are on a ssd rbd pool? Or does ceph and the libvirt drivers do this automatically for you? When testing a nutanix acropolis virtual install, I had to 'cheat' it by adding this <qemu:arg value='device.scsi0-0-0-1.rotation_rate=1'/> To make the installer think there was a ssd drive. Being or not being on an SSD pool is a (possibly) temporary conditition, so if the guest OS makes certain assumptions based on it, it might be invalid an hour later. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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