How are you using searchable xattrs on Linux?

[claudiofp]

Hi, I'm researching workloads that search file extended attributes. I saw that Copyparty can make them searchable with --db-xattr.

If you use this feature on Linux: roughly how many files and xattrs do you index, which queries do you run, and are the attributes changed by tools outside Copyparty? If they are, have rescans or stale tags caused a measurable problem for you?

I maintain MoobFS, an experimental Linux filesystem module that indexes a limited set of typed xattrs on ext4, btrfs or XFS. It would not replace Copyparty's media tags, file index, hashes or account permissions. I'm trying to understand whether the narrower xattr query problem exists in a real deployment before suggesting any integration.

Thanks, Claudio