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Re: [linux-lvm] access or interface to list of blocks that have, changed via C.O.W.?

On 10/04/2012 11:02 AM, Mark Woodward expounded in part:

snapshot target and metadata format. It does not share code with
current (or historic afaik) LVM2/device-mapper and has been dead for a
number of years (last commits around 2008).

get the code. It old and not supported currently, but still works.
Really? I'd be surprised if it even builds against modern kernels or
ddsnap was the Zumastor snapshot tool which uses a different in-kernel
The LVM2 code that ships with most distros still uses the old interfaces and still (Ubuntu 12.04) seemst to create a COW file with SnAp

This utility (ddsnap work alike) requires no kernel changes, and only depends on the layout of the COW (and only on the changed block table):


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