I'm still fiddling with LTO9 and backup performances; finally i've managed to test a shiny new server with an LTO9 tape (library indeed, but...) and i can reach with 'btape test' 300MB/s, that is pretty cool, even if IBM specification say that the tape could perform 400 MB/s.
Also, following suggestion, i'm using spooling to prevent tape to spin up&down; but this clearly 'doubles' the backup time... there's some way to do spooling in parallel? EG, while creating the next spool file, bacula write to tape the current one? Anyway, i'm hit another trouble. Seems that creating the spool file took an insane amount of time: source to backup are complex dirs, with millions of files. Filesystem is ZFS. 'insane amount' means that having a despool performance of 300MB/s, i'm a overral backup performance of 40MB/s... How can i do to improve the spooling performance? What factors impact more? Thanks. -- dott. Marco Gaiarin GNUPG Key ID: 240A3D66 Associazione ``La Nostra Famiglia'' http://www.lanostrafamiglia.it/ Polo FVG - Via della Bontà , 7 - 33078 - San Vito al Tagliamento (PN) marco.gaiarin(at)lanostrafamiglia.it t +39-0434-842711 f +39-0434-842797 Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA! http://www.lanostrafamiglia.it/index.php/it/sostienici/5x1000 (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA) _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users