On Wednesday 11 September 2002 13:17, Anne M. Hammond wrote:
>On Wed Sep 11,  6:52am Gene Heskett wrote:
>>But with only 7 tapes, there is a possibility of over-writing the
>>last full of that disklist entry with only an incremental as
>>amanda gets the scheduling adjusted.  No one here would
>>recommend only 7 tapes, the murphy style disaster is
>>inevitable...
>>
>>You need at least 14, and I have 20 in my own rotation, so I'm
>>always assured that there are at least 2 fulls available in the
>>unlikely event a disk goes belly up on me.
>
>I asked Gene for hise amanda.conf entries, which are:
>
>dumpcycle 1 week
>runspercycle 7
>tapecycle 20
>
>Using this configuration, I understand amanda will schedule
>a level 0 each week (dumpcycle).  At any one time, you would
>have 3 level 0 dumps (in case of tape error, or a dump could
>not be restored).
>
>So tapecycle does not need to be a multiple of dumpcycle or
>runspercycle?
>
>It's not quite clear what amanda.conf recommends the "extra"
>tapes in the tapecycle are for--after amanda has been through
>one cycle of the tapes, there are really no more "extra" tapes??
>
>amanda.conf:
>tapecycle 19 tapes      # the number of tapes in rotation
>                        # 4 weeks (dumpcycle) times 5 tapes per
> week (just # the weekdays) plus a few to handle errors that #
> need amflush and so we do not overwrite the full # backups
> performed at the beginning of the previous # cycle
>
Amanda will use ALL labeled tapes in the rotation, in order, unless 
WE mess it up, and then start over at the top of the list reusing 
them in the same order.\

-- 
Cheers, Gene
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