> On Mar 11, 2016, at 3:14 PM, Simon Templar <stemplar AT opposedtwin DOT com> 
> wrote:

>> On Mar 10, 2016, at 11:09 PM, Kern Sibbald <kern AT sibbald DOT 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).
> 
> 
> 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…

I have this set to about 375GB

  Maximum Spool Size      = 375809638400
  Maximum Job Spool Size  = 375809638400
--
Dan Langille - BSDCan / PGCon
dan AT langille DOT org

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