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Re: understanding a restore
2009-06-15 19:24:49
Brandon Metcalf wrote:
After selecting the directory I need to restore in amrecover, "list"
shows me the following:
TAPE DailySet1-09:9 LEVEL 0 DATE 2009-06-05
/path/to/data
TAPE DailySet1-17:9 LEVEL 1 DATE 2009-06-14
/path/to/data
This seems to imply that since the full backup was done on 2009-06-05
nothing was changed to cause an incremental until 2009-06-14, but I
know this isn't the case. Or at least there is nothing that changed
that wasn't part of the level 1 backup shown above, but this doesn't
seem reasonable given that data changes daily at this location.
I'm sure this is a case of me misintepreting what I'm seeing. What's
the real story?
Every level 1 backup backs up all changes since the last level 0. That
means that the level 1 from 6/14 contains all the changes since 6/5.
So, if file x changed on 6/6, it will be backed up on every level 1
after that until there is another level 0. If enough changes happen,
Amanda may go to level 2. If things weren't done this way, you would
have way too many tapes to refer to in order to accomplish a full restore.
--
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Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogendyk AT bio.umass DOT edu>
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Erdös 4
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