Hello everyone!
I was wondering if anyone out there can help me out and check my logic.
I am trying to contrast Amanda's way of scheduling backup's versus a
standard GFS style backup schedule.
Imagine this setup:
With a GFS style backup schedule:
4 daily tapes; 1 used each day mon-thur
3 weekly tapes; 1 used each friday
12 monthly tapes; 1 used every fourth friday
Imagine this scenario:
A User creates a file on Tuesday; call this the 'original file'.
Tuesday night, it is backed up on Tuesday's tape.
Wednesday, the file is modified; call this the 'modified file'.
Wednesday night, it is backed up on Wednesday's tape.
Friday comes along and the modified file is backed up to the weekly
tape.
Next Tuesday comes along and the modified file is backed up to the
Tuesday tape, overwriting the original file.
Next Wednesday comes along, and the user wants the original file back.
Can it be done? My logic says no; it's been overwritten. All the user
can get back is the modified file.
Does this sound correct?
Imagine this setup:
Using Amanda, I have:
dumpcycle 1 week
runspercycle 6
tapecycle 60 tapes
Using the same scenario, I should be able to recover the original file
anytime, up until that tape is overwritten in 10 weeks (not counting an
occasional amflush). Is that correct?
Thanks for your help!
Anthony Valentine
