On Tue, May 28, 2019 at 12:57:18PM +1000, Tom Robinson wrote:
> On Tue, 14 May 2019 at 22:14, Nathan Stratton Treadway <natha...@ontko.com>
> wrote:
> 
> Hi Nathan,
> 
> Thanks for you reply and help.
> 
> On Mon, May 13, 2019 at 09:59:13 +1000, Tom Robinson wrote:
.....
> 
> I am getting a new issue now which is annoying but not a show stopper. I
> think I will have to revisit my threshold settings to fix this but maybe
> you can offer some insight.
> 
> I have a tape robot and the following settings in amanda.conf
> 
> runtapes 3
> flush-threshold-dumped 100
> flush-threshold-scheduled 100
> taperflush 100
> autoflush yes
> 
> There is enough room for all the data to go on three tapes yet after the
> amdump run is complete only two tapes are written and I am left to flush
> the remaining dumps to tape manually.
> 
> I think it's because I'm trying to get a whole tape's worth of data before
> writing to tape. Is my thinking correct?

With "taperflush 100" you are saying do not write to tape unless
the tape will be filled.  So the third tape, being a partial, is
not written.

However you should not need to manually flush the data, "autoflush yes"
will write the leftover dumps onto the first tape of the next run.
> 
> What I'd like to do is make sure there's a tape's worth of data to write to
> the first two tapes in turn and then dump all remaining backup data to tape
> three (this will not be a complete tapes worth).
> 
> Should I be setting taperflush as follows to achieve this?
> 
> taperflush 0

Yes, from the comments in the sample "amanda.conf".

# You want to improve tape performance by waiting for a complete tape
# of data before writing anything. However, all dumps will be flushed;
# none will be left on the holding disk.
#
# flush-threshold-dumped        100 # (or more)
# flush-threshold-scheduled     100 # (or more)
# taperflush    0

jl
-- 
Jon H. LaBadie                 j...@jgcomp.com
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