ADSM-L

Re: Journal Based Backups

2006-06-14 08:52:37
Subject: Re: Journal Based Backups
From: "Allen S. Rout" <asr AT UFL DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 14 Jun 2006 08:52:04 -0400
>> On Tue, 13 Jun 2006 12:38:20 -0500, Mike <mikee AT MIKEE.ATH DOT CX> said:

> Comparison to the time of another file.
> [ more details ]

If you use incrementalbydate, then there is, similarly, no
recordkeeping communication.  The differences are:

+ The timestamp used for comparison is the time of the beginning of
  the previous incremental.

+ No intermediate list of files as a side effect.

These are probably not inconveniences, but might be.



Whenever folks get into incrbydate or any method that simulates it
(like yours, Mike), there are several things to look out for.


1) deleted files are NOT DETECTED.  This makes sense if you think
   about it: the list you generate can't contain the not-present
   file. That means you must do a normal incremental occasionally.

2) Unpacked archives which retain datestamp information can be
   skipped.  This used to be a real pain, back in the days of 'dump'
   and 'restore'.



- Allen S. Rout