geom_mirror and ggatec/d safe for filesystem replication?
Colin.Farley at ecarecenters.com
Sat Sep 24 14:03:16 PDT 2005
I can't say if this config is safe because I don't have any exper ieince with it. But, I can say that I use rsync to sync filesystems on
two failo filesyst the backup. network between the t normally fairly small. for about 9 or 10 months. alternative if it is practical for replicate.
-----owner-freebsd-stable at freebsd.org wrote: --
To: From: Brian Candler <B.Candler at pobox.com& Sent by: owner-freebsd-stable at freebsd.org
Date: 09/24/2005 09:21A Subject: geom_mirror and ggatec/d safe for filesystem
Consider the following scenario:
- Machine 1 has a UFS filesy - It is mirrored to a block device on machine 2, geom_mirror
- Machine 2 mounts this My question is: is this last step safe?
When an update occurs on machine 1, certain disk blocks will change
"under the nose" of machine 2's mounts. Will all necessary caches be
invalidat (e.g. block caches, inode caches) Or could this result in nasty
beha up to and including panics?
If so, is there a safer or bet filesystem
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