On Apr 20 07:33, Christoph Hellwig wrote: > On Tue, Apr 19, 2022 at 02:10:38PM +0200, Klaus Jensen wrote: > > From: Klaus Jensen <k.jen...@samsung.com> > > > > Do not default to generate an UUID for namespaces if it is not > > explicitly specified. > > > > This is a technically a breaking change in behavior. However, since the > > UUID changes on every VM launch, it is not spec compliant and is of > > little use since the UUID cannot be used reliably anyway and the > > behavior prior to this patch must be considered buggy. > > So unlike the EUI, UUIDs are designed to be autogenerated even if the > current algorithm is completely broken. We'd just need to persist them. > Note that NVMe at least in theory requires providing at least on of > the unique identifiers, and the UUID is the only one designed to be > autogenerated in a distributed fashion.
I understand, but it boils down to the fact that we do not have a general method of storing "metadata" like this persistently. But maybe it is time that we come up with something to do this.
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