Thanks Kern,
I will ask Quantum about the best setting for the Block Size.
The file size I have set to 20 GB at the moment.
Thanks, Frank
Am 21.04.2021 um 12:09 schrieb Kern Sibbald:
From my experience (up to LTO-5), using 524288 as a block size is a
reasonable size. However LTO-7 drives are even faster, so you might
try some tests with Maximum block size = 1048576. Some people
recommend much larger sizes, but in my tests (LTO-5) there is little
speed gain with even bigger block sizes, and according to a Quantum
technical tape specialist, you might experience more errors.
Also you should set Maximum File Size = 5G or bigger. This determines
how often Bacula writes EOF marks, which really slow down writing.
The bigger Maximum File Size is the faster (in general) Bacula can
stream to tape. However, if you set it too big it will take longer to
get a single file back. Bacula can position quickly to a block
boundary but must search within a block for any given file. If you
are restoring everything, then Bacula will only have to search on the
first file to be restored -- all the rest of the files will be found
sequentially.
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