On Feb 19, 2020, at 07:17, Riccardo Veraldi
mailto:riccardo.vera...@cnaf.infn.it>> wrote:
Hello,
I wanted to ask if anybody is using lustre as a FS backend for virtual
machines. I am thinking to environments like Openstack, or oVirt
where VM are inside a single qcow2 file basically using libvirt to access the
underlying filesystem where VMs are stored.
Anyone is using Lustre for this and if so any best practice for the specific
utilization of Lustre in this environment (libvirt storage backend) ?
Riccardo,
I don't have any specific examples of this with containers, but AFAIK ANU/BOM
in Australia presented about using Lustre for root filesystem images for their
client nodes, which is similar. I think you'd want to use fast flash-based
storage for the VM images, since they will typically be updated with random 4KB
IOPS from the guests. Lustre 2.12 has much better flash performance than with
2.10 (there have been a few presentations about this recently).
Cheers, Andreas
--
Andreas Dilger
Principal Lustre Architect
Whamcloud
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