Hi *SM'ers ! I'm facing kind of strange behaviour of our Informix clients : everyday 5 AM informix servers are doing a level 0 (complete) backup of their Db, that goes directly to tape (LTO drives, in a 3584 library, connected on an IBM SAN data gateway 3108 G07 model) through a fiber channel network, and the problem is that the transfert rate varies randomly from an approx 7000 kbps to a 35 !!! kbps. Problem does'nt seem to come from the network, because the same machine at the same time is able to send its logical logs at a normal transfer rate, but on ssa disks this time. Did anybody face the same kind of problem, or does anybody have an idea to test or improve performance ? Thanks a lot for any precious advice ! Arnaud
