We are using the INTER and MAXTAPEBUF options in Turbo Store.  We ditched
Road Runner and that would be another LONG discussion.

Denys had a good suggestion to see if the data we are working with may be
causing a bottle neck on the disk i/o side. We are going to try a backup of
the test data to $null and see how long it takes.

Carl


>Because the tape drives are not the limiting factor in your backup speed.
It's
>probably time spent fetching data from disk and preparation for sending to
>tape.  Are you interleaving files on tape?

>Also, RoadRunner doesn't read a file which spans multiple drives in logical
>sequence.  It is aware of which extents fall on which spindle and reads
extents
>on multiple drives concurrently as much as possible.  This also helps
increase
>the parallelism of disc reads during the backup.  I don't know whether
>TurboStore also does that, but with the TurboStore default of no
interleaving,
>it's my understanding that the files are always stored in logical order on
>tape...  hence the file has to be read one extent at a time in order.

>If you use RoadRunner, which if I recall correctly you used to use there,
try
>increasing the interleave to 8.  If you use TurboStore, then add the
;INTER=
>option and run your test again.  I would be very interested in seeing the
>results.
>--
>Jeff Woods
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