On Wednesday 20 November 2002 17:36, Jean-Louis Martineau wrote:
>On Wed, Nov 20, 2002 at 01:47:50PM -0600, Deb Baddorf wrote:
>> What kind of optimiaztion does amanda use while flushing
>> dumps to tape?
>>
>> While doing the dump initially,  she seems to
>> optimize to get the small jobs done first, and thus they
>> go onto tape in a similar order.   But I'm currently without
>> a stacker.  So only the first part of the dumps make it
>> to tape "live"  (so to speak)  and the rest get flushed as I
>> manually mount tapes.   I'm hoping that some kind of
>> knapsack-packing algorithm is used ..... to fit the largest
>> files on the tape first,   but then to add smaller ones to
>> fill the top of the "sack".
>>      My archival "do all the level 0's" is taking up 5 tapes,
>> hence the optimization question!
>
>There is no optimazation, first in, first out.
>That's a need feature.
>
>Jean-Louis

Humm, from a recent example/amanda.conf:
-------------
dumporder "sssS"        # specify the priority order of each dumper
                        #   s -> smallest size
                        #   S -> biggest size
                        #   t -> smallest time
                        #   T -> biggest time
                        #   b -> smallest bandwitdh
                        #   B -> biggest bandwitdh
                        # try "BTBTBTBTBTBT" if you are not holding
                        # disk constrained
------------
I'm assuming that when Deb asked about it, using the word 
'flushing', that Deb meant a normal amdump run as opposed to a run 
of amflush, or an autoflush.  I've no idea whether its active for a 
flush, or just an amdump run.  I have no idea if it even works, but 
I'll find out tonight if I can stay awake till then.  I just 
modified mine to do the biggest ones first, and amstatus should be 
able to see if its working that way pretty shortly after the 
estimates are done.

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz  512M
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