Re: [pve-devel] [PATCH qemu-server 1/2] migration: avoid migrating disk images multiple times

[Fiona Ebner <f.ebner@proxmox.com>]

Am 02.05.23 um 15:17 schrieb Aaron Lauterer:
> Scan the VM config and store the volid and full path for each storage.
> Do the same when we scan each storage.  Then we can have these
> scenarios:
> * multiple storage configurations might point to the same storage
> The result is, that when scanning the storages, we find the disk image
> multiple times.
> -> we ignore them
> 

Having the same storage with overlapping content types is a
configuration error (except if you use different 'content-dirs' I
guess). We can't make guarantees for locking, which e.g. leads to races
for allocation, it can lead to left-over references, etc.. Rather than
trying to handle this here, I'd prefer a warning about the
misconfiguration somewhere (maybe during storage.cfg parsing?) and/or
error out when attempting to create such a configuration. Adding
something in the docs also makes sense if there isn't yet.