On Fri March 3 2006 3:29 pm, roland wrote:
> i think i will take a closer look on device-mapper, but i'm unsure if it`s
> perfectly suited.
>
> can i only use devices, not files for the cow?
Yes, Device-Mapper can only map to block-devices. If you need to do this with
files, you could use losetup to create block-device from them. However, the
COW device still won't "grow" automatically as you described.
> what about merging a cow-dev/file back to the r/o-dev/file ?
Device-Mapper does not directly support this, but EVMS provides a "rollback"
function for reverting an origin volume back to the contents of its snapshot
volume.
--
Kevin Corry
[email protected]
http://www.ibm.com/linux/
http://evms.sourceforge.net/
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