In my case using spooling didn’t prevent shoe-shining; it just introduced long
pauses while data was spooled. I think all this means is that I can read from
my data sources faster than my tape can write.
So far the only change I made to help with shoe-shining was to set Max File
Size to a large number (mine is now set to 20g, after first trying 3gb then
5gb). This one change alone is probably responsible for most of the performance
increase that I’ve been able to achieve thus far. I’d like to test and tune
more, but I’m still wrestling with things like tape mount timeouts (no 3rd
shift operators), job run time timeouts, etc…
-Simon
> On Mar 10, 2016, at 11:09 PM, Kern Sibbald <k...@sibbald.com> wrote:
>
> I have not tried this, but one thing that may help a lot is to turn on
> data spooling for the tape device. This will probably not speed up the
> process but should prevent that tape shoe-shine (start and stopping).
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