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Date: Mon, 10 Nov 2003 20:00:30 -0800
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Andrea Arcangeli wrote:

>>On Mon, 10 Nov 2003, Andrea Arcangeli wrote:
> The best way to fix this isn't to add locking to rsync, but to add two
> files inside or outside the tree, each one is a sequence number, so you
> fetch file1 first, then you rsync and you fetch file2, then you compare
> them. If they're the same, your rsync copy is coherent. It's the same
> locking we introduced with vgettimeofday...

How is this different from writing one file named LOCK while updating
the tree?

I know this is a really basic question, but it also seems like a really
old problem which must have been solved multiple times by now.  Am I
really wrong about this?