Jon LaBadie said:
<snip>
> A bit of more explanation in the text might be in order.
> For example, I entered 6 runs then 1w for the time period.
> But I did not realize that 1w was going to be my dumpcycle.
Perhaps my understanding of the configuration is flawed. I thought that
dumpcycle was the number of days/weeks that span the runspercycle. So for
example if someone does M-F backups, dumpcycle should be 7 days (these happen
over the course of 1 week/7 days), and runspercycle should be 5 (one on M, Tu,
W, Th, F). For one backup per month, dumpcycle would be 1 month or 31 days,
runspercycle 1.
Is this not correct? I have set up my configurations in this manner for a
while, and it seems to have worked OK. Am I missing something?
> For example, suppose I really wanted a 14 day dumpcycle,
> but was not doing dumps on Sunday. That is still 6 per week,
> but 1 week is not the dumpcycle.
In this case, I would have said dumpcycle 14 days, runspercycle 12.
> There have also been a number of odd combos reported on the list.
> Some of them have produced quite heated commentary.
>
> Some examples, but maybe not the real ones that came up:
>
> 3 day dumpcycle, dumping only on weekdays (what is runs/cycle?)
I would have said dumpcycle 3 days, runspercycle 3. Since dump won't be called
on weekends, don't we effectively get the desired result?
> 3 dumps a week (MWF) with a maximum of 4 or 5 day dumpcycle
I would have extrapolated dumpcycle up to 7 days (since it's calculated over a
weeks' time), then set runspercycle to 3.
> If you ever figure out what to do with these oddities,
> you are a better person than I. The problem is how will
> amanda "balance" the dumps over the runspercycle when there
> are gaps (days) between dumps.
I have similar odd configurations that I do, and amanda seems to work OK:
daily backup that runs Mon,Tue,Thu,Fri,Sat:
dumpcycle 14 days, runspercycle 10
weekly backup that runs Wed except 1st Wed of month:
dumpcycle 7 weeks, runspercycle 6
monthly backup that runs 1st Wed of month except for 1st Wed of year:
dumpcycle 365 days, runspercycle 11
yearly backup that runs 1st Wed of year:
dumpcycle 3653 days, runspercycle 10
In all these cases, amanda is thrown off a little in the balance reports, but
this does not seem to adversely affect the tape balancing. Am I
misunderstanding the whole thing? I created this script to refine my
understanding of how these amanda configurations are "supposed" to be set. If
I have holes in my understanding, I would like to find out so I can adjust my
amanda config accordingly and then update the "assistant" script.
> Good first cut. A slightly more polished version could well be
> useful to many beginning amanda administrators.
Thanks; all feedback is appreciated. Are you referring to the above issue WRT
polish, or do you think other parts need changing as well?
--
Kurt Yoder
Sport & Health network administrator
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