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xfsdump, the journal, and incremental dumps of subtrees...

To: linux-xfs@xxxxxxxxxxx
Subject: xfsdump, the journal, and incremental dumps of subtrees...
From: Neil Harkins <nharkins@xxxxxxxx>
Date: Fri, 4 Nov 2005 17:04:15 -0800 (PST)
Sender: linux-xfs-bounce@xxxxxxxxxxx
Hi. New to list, and didn't find an answer in the FAQ, or 
a quick search of the archive, sorry if this resurrects a horse:

Does xfsdump -l use the journal to determine what's changed
for an incremental dump? 

Background: I'm currently using rsync to perform incremental updates
of a subtree with a significant number of files, when only about 5%
changes, and the filesystem walk to check each file's timestamp 
is totally unnecessary if the journal can be consulted. 
 
If xfsdump uses the journal to avoid the walk, then using 
xfsdump | xfsrestore would be ideal, except according to 
the man page, it doesn't allow incrementals of subtrees. :(
Could someone explain why that is the case?  

Thanks in advance for any insight,
-neil 
 


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