Solution : https://service.sap.com/sap/support/notes/828354 (SAP Service marketplace login required)
Key words : 
separate journal receiver library sap<sid>jrn, java data library sap<sid>db, journal receiver library sap<sid>jrn, 'r3<sid>data qsqjrn     file     ', journal sap<sid>db/qsqjrn, library r3<sid>jrn, sap<sid>db/qsqjrn, r3<sid>jrn/qsqjrn, r3<sid>data/qsqjrn, sap<sid>db separately
Related Notes : 
       
| 1449715 | IBM i: Current recommendations for journal configuration | 
| 744055 | iSeries: Changing the default journal | 
| 448552 | IBM i: How can I decrease the journal size? |