Re: [libvirt] [PATCH 3/3] systemd: Modernize machine naming

On Wed, Feb 03, 2016 at 01:16:02PM +0000, Daniel P. Berrange wrote: I hate UUIDs, but the only other thing that I was offered was punnycode encoding using libidn. And nobody seemed to have an opinion on that. TL;DR Woud you agree on <drivername>-<id>-<name> where non-ascii characters are stripped fromt the name and then the whole string is truncated to 64 characters if it is longer than that? More blabber follows... I like the idea of using ID. That would help a lot. However, it would only make sense for long enough names. Let's say there won't be any user who would have a two machines, one with too long of a name and other with a name that is a prefix of the first one with -<number> appended. Also we could use the ID for every machine name, I think <drivername>-<id>-<name> still looks nice. Anyway, that doesn't deal with international characters in the name. And that can be split into two different problems as well. You can have a name that has one non-ASCII character in it. If we strip it, we are not going to have the uniqueness, but you can at least know which name represents which machine. However, there are then names that are with no ASCII characters at all, e.g. different alphabet. Stripping those means you have an empty string. Escaping on the other hand leads to longer names and in the second case is not readable at all. So as a conclusion, would you agree if we did the driver-id-name where non-ascii characters are stripped and then the whole string is truncated to 64 characters if it is longer?