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Interrupted xfsdump Resume Behaviour for Regular Dump File

To: xfs@xxxxxxxxxxx
Subject: Interrupted xfsdump Resume Behaviour for Regular Dump File
From: Gim Leong Chin <chingimleong@xxxxxxxxxxxx>
Date: Sun, 20 Nov 2011 21:14:18 +0800 (SGT)
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Hi,

I have observed this since some time back.  I have just done an experiment.

1) Using xfsdump 3.0.6, I first did a full dump to regular file and restore, 
checked that every thing is correct.

2) I then did the same dump again, but interrupted it.  Then I resumed the 
dump.  I noted that the resumed dump file is the exact same size as the full 
dump file.

3) First I did a cumulative restore, with the interrupted dump file, followed 
by the resumed dump file.  I checked that the restore is correct.

4) I then did a non-cumulative restore, using only resumed dump file.  The 
resume is successful, and I checked that the restore is correct.

The logs are attached.

The conclusion is that the so-called resume of an interrupted dump session to 
regular file produces a full dump file, that is sufficient by itself to do the 
full restore.

Are my observations of the behaviour of xfsdump correct?


Everything was done on openSUSE 11.4 x86_64.


GL

Attachment: xfsdump3.0.6_interruptissue
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