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Hi everybody,
Hoping somebody can clarify something about amanda
for me.
I have my backups set to run on a 3 day dump cycle
with 6 tapes, running every evening except sunday night. It
seems to work fine, we change the tape each morning so over the course of a week
(if I understand how amanda works right) we get two sets of full
backups. Sometimes we forget to change a tape, and most
Saturdays we don't have anybody here to change the tape so on those days I
thought that Amanda just backed up to the holding disk and then the next morning
we could just change the tape, do an amflush, then change the tape again so that
it would be ready for the next night.
However, I've noticed that every time Amanda
doesn't find a writeable tape (usually due to the tape not being changed that
day) there is very little data written to the holding disk and the amflush is
very very small. The day after this, the dump is much larger than
usual compensating for this. When we change the tapes every
day, each tape is usually around 50% full. On a day when
we forget to change the tape or are unable to change the tape the amflush
results in about 0.5% tape useage, and the day following the day we did the
amflush tape useage is usually 85-90%. Is this how
it's supposed to behave? How can I fix it to do a normal dump to the
holding disk on days when either we can't change the tape or we forget to change
the tape?
Thanks for any explanation and/or
tips.
-Jeff
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