On Thu, 22 Sep 2011 14:06:14 -0400
gene heskett <[email protected]> wrote:

> On Thursday, September 22, 2011 01:43:56 PM Charles Curley did opine:
> 


> I have now added another 20Gb to the vtape size, so it should flush
> the leftovers and do a normal backup tonight.
> 
> But as far as any 'balance' is concerned, I am under the impression
> the scheduler is blindfolded and playing "pin the tail on the donkey"
> as it doesn't seem to even be approaching a balanced use after nearly
> 2 more weeks of every night runs.
> 
> [root@coyote Daily]# su amanda -c "amadmin Daily balance"
> 
>  due-date  #fs    orig MB     out MB   balance
> ----------------------------------------------
>  9/22 Thu    0          0          0      ---
>  9/23 Fri    2      18976      10600    -18.5%
>  9/24 Sat   10      21077       9546    -26.6%
>  9/25 Sun   21      21436      13499     +3.7%
>  9/26 Mon    3      31429      31429   +141.5%
> ----------------------------------------------
> TOTAL       36      92918      65074     13014
>   (estimated 5 runs per dumpcycle)
> 
> So that last one on the 26th will do this all over again.  That sort
> of a report is beginning to develop a pretty high vacuum here.  I can
> recall, back when my system was smaller and I was using 4Gb tapes, it
> could stay at 94% +- 3% media use for weeks at a time.  Now, even
> before the extended shutdown, I am running out of tape because it
> decides to do level 0's of /usr/movies (17Gb) and /home (20 Gb) on
> the same nights.  That sucks.

Gene:

backup@dzur:~$ amadmin DailySet1 balance

 due-date  #fs    orig GB     out GB   balance
----------------------------------------------
 9/22 Thu    1         13         10   +233.3%

 9/26 Mon    1          3          2    -33.3%
 9/27 Tue    1          5          5    +66.7%
 9/28 Wed    1         10          8   +166.7%
 9/29 Thu    1          3          3     +0.0%
 9/30 Fri    1          7          6   +100.0%

10/03 Mon   25          2          2    -33.3%
10/04 Tue    1          4          4    +33.3%
10/05 Wed    3          3          2    -33.3%
10/06 Thu    1          4          4    +33.3%
----------------------------------------------
TOTAL       36         54         46         3
  (estimated 15 runs per dumpcycle)
backup@dzur:~$ 


And your problem is?

Consider enabling tape splitting. That might use your disk space more
efficiently than increasing the "size" of the tape.


-- 

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