I have about 100 tapes.  My tape library holds only 10 tapes.

How do you decide which tapes to load into the library?  What strategy do
you use?

Here is what I came up with.

For simplicity, all my tapes are in a single pool.  I'm guessing I want
the tapes with the oldest LastWritten value.  Something like this:


  SELECT mediaid, volumename, slot, volstatus, lastwritten
    FROM media
   WHERE mediatype = 'DLT'
     AND volstatus in ('Append', 'Full')
ORDER BY volstatus, lastwritten ASC
   LIMIT 20;

That gives me:

 mediaid |   volumename   | slot | volstatus |     lastwritten
---------+----------------+------+-----------+---------------------
     268 | DGG441         |    8 | Append    |
     269 | DGG471         |    9 | Append    |
     270 | DGG465         |   10 | Append    |
     267 | DGG457         |    7 | Append    |
     263 | DGG443         |    3 | Append    |
     266 | DGG442         |    6 | Append    |
     265 | DGG469         |    5 | Append    |
     264 | DGG467         |    4 | Append    |
     262 | DGG472         |    1 | Append    |
     100 | DLT7000-001111 |    0 | Full      | 2008-12-07 14:03:20
     101 | DLT7000-JYN220 |    0 | Full      | 2008-12-17 08:16:41
     102 | DLT7000-JYN221 |    0 | Full      | 2009-01-04 07:12:47
     103 | DLT7000-JYN231 |    0 | Full      | 2009-01-10 07:22:38
     105 | DLT7000-JYN225 |    0 | Full      | 2009-02-01 08:44:52
     107 | DLT7000-JYN232 |    0 | Full      | 2009-03-01 14:44:50
     108 | DLT7000-JYN233 |    0 | Full      | 2009-03-24 13:16:00
     109 | DLT7000-JYN234 |    0 | Full      | 2009-04-05 09:49:51
     110 | DLT7000-JYN236 |    0 | Full      | 2009-04-16 12:20:04
     117 | DLT7000-JYN245 |    0 | Full      | 2009-06-13 06:11:52
     119 | DLT7000-JYN247 |    0 | Full      | 2009-06-23 06:28:06

-- 
Dan Langille -- http://langille.org/


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