Thanks for reporting this. It may be related to yesterdays Jenkins outage as the Master was restarted and some jobs may have not cleaned up their data properly. ovirt-srv22 seems to have dozens of gigabytes on disk and RAM drive at the moment. Probably our daily workspace cleanup job did the trick (it ran 40 minutes ago). Sorry for the inconvenience. If this happens again - please let me know and I'll offline the slave in question and clean it up manually.