From: Konstantin K. <fla...@us...> - 2011-07-26 12:04:45
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On Tue, 26 Jul 2011 00:18:05 -0700 Steve Ellis <el...@br...> wrote: [...] > Another point, even with your current config, if you > aren't doing data spooling you are probably slowing things down > further, as well as wearing out both the tapes and heads on the drive > with lots of shoeshining. (I'm asking as a person having almost zero prior experience with tape drives for backup purposes.) Among other things, I'm doing full backups of a set of machines to a single tape--yes, full backup each time, no incremental/differential which means I supposedly have just straightforward data flows from FDs to the SD. At present time I have max concurrent jobs set to 1 on my tape drive resource and no data spooling turned on. Would I benefit from enabling data spooling in this scenario? To present some numbers, each machine's data is about 50-80G and I can use about 200G for the spool directory which means I could do spooling for 3-4 jobs in parallel (as described in [1]). Would that improve tape usage pattern? 1. http://www.bacula.org/en/dev-manual/main/main/Data_Spooling.html |