John Drescher schrieb: > > I'd like to purchase an autoloader to run with bacula. I need to do up > > to 2tb a night > 2TB in one night. You may have to get an LTO3 autoloader to do that. I > hope your have a gigabit link to the data storage. I remember doing a > 2TB backup in the past but I am sure it around 15 to 20 hours to > complete.
How usefull is spooling in this case? The amount of data here is growing too. At the moment I'm spooling the data to disk before writing it to tape, but I'm only backing up a few hundred Gb's. spooling throughput: Job write elapsed time ... Transfer rate = 51.15 M bytes/second tape throughput : Despooling elapsed time ... Transfer rate = 70.29 M bytes/second overall throughput: Rate: 27022.4 KB/s For 2TB I would need ~18h with spooling and ~11h without. I'm not sure how critical shoe shining is for LTO3 drives. But it would be definitly nice if one could spool and despool data at the same time. So that bacula starts despooling to tape right after filling the buffer with a certain amount of data. Depending on the disks that are use for spooling this would raise the overall performance, maybe not to the max. despool rate, but over the current overall throughput. I think there was a discussion about this on the list last year, and maybe a feature request too. To get on topic again: I can recommend the NEC-T40A LTO-3 changer. It starts with 24 slots and can be expanded to 40 slots with a simple licence key (2 keys, each for 8 slots). It's working fine with bacula. Ralf ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
