Last modified: 2013-10-10 13:16:54 UTC
DB connection error: Unknown database 'p50380g50497__wikidb_arwiki' (arwiki.labsdb) I believe I created it a while ago. This specific database is not something important, and I can recreate it easily, but p50380g50497__wikidb_zhwiki on zhwiki.labsdb is important to my bot and I don't want it to get lost later.
User databases are not part of any backup or mirroring infrastructure, and should be considered to be ephemeral (although, in practice, they will be long-lived). I would very much recommend that any hard to replace data in them be backed up to the filesystem at regular interval.