xfs
[Top] [All Lists]

re[2]: Snapshots

To: Seth Mos <knuffie@xxxxxxxxx>
Subject: re[2]: Snapshots
From: Greg Freemyer <freemyer@xxxxxxxxxxxxxxxxx>
Date: Thu, 2 May 2002 16:14:11 -0400
Cc: xfs mailing list <linux-xfs@xxxxxxxxxxx>
Organization: The NorcrossGroup
Sender: owner-linux-xfs@xxxxxxxxxxx
 >>  On Thu, 2 May 2002, Greg Freemyer wrote:

 >>  > XFS team,
 >>  >
 >>  > I've just become aware of a problem on another Journaled file-system (it
 >>  is not a Linux filesystem).

 >>  A NAS device perhaps?

Thanks for the info, and no it is a normal everyday FS.  (And a mature one at 
that.  Atleast 5 years old, but I guess hardware snapshots are relatively new. )

The problem apparently occurs in both direct connect and SAN environments.

As I understand it the trouble is that some meta-data can be in transition even 
for just a few millisecs.  If the hardware snapshot is made at this time, you 
get corruption.

As you and Steve said, xfs_freeze looks like it is specifically designed to 
handle the problem, so I'm happy.

Greg Freemyer



<Prev in Thread] Current Thread [Next in Thread>