On Tue, 2008-06-03 at 15:43 -0500, Chris Cox wrote:
>
> I would think this would be VERY hard to do since both the "origin" and
> "snapshot" change (file deletes, etc).
I don't think it's as difficult as you are thinking it is. You are
thinking of synchronizing filesystems, at the filesystem level, but
merging a snapshot back up into the origin does not deal with files or
even filesystems. It deals with block devices and blocks, and is really
nothing more than a coordinated:
for each COW_block in snapshot; do
for other_snapshot of origin; do
copy origin[COW_block] to other_snapshot[COW_block]
copy snapshot[COW_block] to origin[COW_block]
done
done
> Do you have a set of rules you
> use for the merge?
There is no filesystem level merge. There are no rules needed.
b.
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