We’re using XtraBackup to backup our Galera Cluster. We had some testings. We also tested the restore. We’re doing at 00:30 every day a full backup and then incremental ones. It was working perfectly with prepare and then the restore. But after the restore we see a lot (amount of incremental backups) databases on the restored cluster/server (#mysql50#Incremental-09022018_xxxxx [xxxx = time]). All of those does not have any tables and are 0.0 bytes big. when I want to delete them it says me ‘Error Code: 1010. Error dropping database (can’t rmdir ‘./Incremental-09022018_011001/’, errno: 17)’
What are does databases and how i can delete them? and why are they there?
When i do a ‘dir -l’ on ‘/var/lib/mysql’ i see those databases too, and all belongs to mysql:mysql like the other (normal) databases