On Tuesday 15 February 2005 02:44, Jamie Wilkinson wrote:
>This one time, at band camp, Frank Smith wrote:
>>--On Tuesday, February 15, 2005 17:44:32 +1100 Jamie Wilkinson 
<jaq AT spacepants DOT org> wrote:
>>> We've got one problem machine that has about 90GB in one DLE, and
>>> our tapes are 100GB LTO1s.
>>>
>>> Of course, once a cycle, the server decides it can only write
>>> maybe 5 DLES out of 150+ to the tape, because one of them is
>>> 80GB+, and so all the other dumps end up being reported as
>>>
>>>   FAILED [dumps way too big, 1 KB, must skip incremental dumps]
>>>
>>> which afaict means that amanda doesn't even attempt to back up
>>> this DLE because it knows it's not going to fit it on the tape.
>>>
>>> But I've got a ton of free space in the holding disk.  What I
>>> want to know is, is there an option to tell the server to do the
>>> dumps anyway and hold them, so later I can come along with
>>> another tape and flush them?
>>
>>If you have plenty of holdingdisk space, I would think they would
>> go there. Even with the default reserve of 100%, you should still
>> get the incremental. You might have to look in the debug files to
>> see why they were completely skipped.
>
>Well, I did check, and there were no incrementals in the holding
> disk. According to the debug log, the planner fails the dumps right
> after building the schedule.
>
>>> In general, we only need one LTO1 a day, this particular DLE is a
>>> freak statistic well outside the standard deviations of the other
>>> DLE sizes, so doing a flush once every cycle is more appealing
>>> than allocating two tapes per run.
>>
>>Just because you set runtapes > 1 doesn't mean Amanda will use them
>> all. I keep runtapes set to a number higher than what normally
>> gets used per run, and have autoflush set true.  That way even if
>> I have a tape error and it all goes to disk, the next run can
>> flush it all and do the backups as well without running out of
>> tape.
>>  If you normally only need one tape, then that's what it will
>> normally use, even if you have runtapes set to 2 or 3 or whatever.
>>  The higher number just allows it to use additional tape(s) if
>> needed.
>
>I was under the impression that Amanda would choose dump levels to
> fill as much of the tapes as possible.  That's incorrect then?

If the holding disk is reserved 100% for incrementals, which is the 
default, no, it won't do any of them.

-- 
Cheers, Gene
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