Hello, I moved many of my lustre clients to 2.9.0. Anyway the server version is pretty old (2.4) Do I have to worry ? Things seems working though May 4 14:37:48 psana1620 kernel: [ 43.145108] Lustre: Server MGS version (2.4.1.0) is much older than client. Consider upgrading server (2.9.0) thank you Ricl