Re: large number of hot plug disks
On Tue, Sep 08, 2020 at 08:19:21AM -0400, Alexander Wels wrote:
Hi,
I am working on a project, and one of the requirements is that I can
hotplug a large number of disks. Think several dozens to potentially 100+.
The guest OS will be some linux flavor so it should have no problem with a
large number of disks.
During my experimentation I quickly ran into the "No available PCI slots"
limit. I found https://libvirt.org/pci-hotplug.html explaining to me why
the limit is there. Now I could add a bunch of pcie-root-ports ahead of
time, but there is likely a limit to that as well. So before I go down some
crazy paths, I figured I would ask on here if there is a better plan than
adding a bunch of root ports for adding a large number of hotplugged disks?
While you can add extra PCI bridges, I'd suggest using virtio-scsi
instead
These blog posts should serve as warning about some of the limits
you'll hit:
https://rwmj.wordpress.com/2017/04/25/how-many-disks-can-you-add-to-a-vir...
https://rwmj.wordpress.com/2017/04/28/how-many-disks-can-you-add-to-a-vir...
Regards,
Daniel
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