On 21/08/12 17:46, lst_hoe02 AT kwsoft DOT de wrote:

>> That means there's some room for improvement in despooling speed,
>> but the big bottleneck at the moment is disk-fd and fd->sd, not
>> sd->tape - the best achieved there is a sustained 52MB/s and that
>> virtually maxes out a 1Gb/s NIC. Even if the network block sizing is
>> optimized, I need to look at 10Gb NICs and for simultaneous
>> spool/despooling.
>
> We plan to takle this one with parallel running jobs doing spooling to
> SSD and despooling to tape. As far as i understand spooling/despooling
> can happen in parallel if using different jobs.

I already do this (7 drives, 6 pools), but it still means individual 
TB-class jobs take too long to run.

>> WRT "offsite backups" - I'm more inclined to use a good firesafe in
>> another building than pass media to a 3rd party company. Far too
>> many people backup to tape but then don't take care of the media.
>
> Our's are in a Bank safe at the other end of the town and in the
> future they are also encrypted thanks to Bacula :-)

In the present they can be encrypted too, for LTO4 and higher. Hardware 
encryption is a lot faster than software.





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