RE: [Bug-tar] restoring from incremental question

[John McDole]

This is for restoring from previous backups.  A true backup is a
snapshot of the file system at the time of backup. If your server
crashes and you in the middle of your backup cycle (e.g. Full backups
early Monday morning, incremental the rest of the mornings), say on
Wednesday afternoon the system crashes, you have Full:Monday,
Inc:Tuesday,Wendesday.  To re-create Wednesday you need start with
Monday and do a listed-incremental restore from each file...  If a file
or directory were deleted on Tuesday afternoon, it would exist in the
full: Monday, inc:Tuesday, but not in the Wednesday incremental and
should be removed.

Now, if you want to just untar with out having directories removed --
don't use the --listed-incremental option!  The file deleted on Tuesday
will not be removed with the Wednesday morning restore.  This is helpful
when a user deletes a file accidentally and only a partial restore is
needed.

-- 
John Thomas McDole

-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf
Of John R. Vanderpool
Sent: Monday, December 19, 2005 2:29 PM
To: address@hidden
Subject: [Bug-tar] restoring from incremental question

i read in some older tar-bug messages about restoring from
--listed-incremental archives that it would then delete files that were
not in that arhive!? (to make it match the state of the archive at that
point)

i hope this code was yanked or never put in (and if it is in, what
version(s) is it in?) because that behavior would mess us up really bad.


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