On Thu, Jan 24, 2013 at 11:42:35pm +0000, Alasdair G Kergon wrote: > So look at thin provisioning with its zeroing option. > External origin. (support currently being added to lvm) > > Or this not-yet-upstream target: > http://people.redhat.com/agk/patches/linux/editing/dm-add-zeroed-target.patch > > Alasdair Thanks Alasdair, this seems to fit the bill perfectly, it's a shame it's not yet merged upstream. Until then, if we are to go with the "snapshot-over-the-zero-target" route, can you comment on quantifying the space overhead of tracking chunks in the snapshot? Thanks again, Vangelis. -- Vangelis Koukis vkoukis@grnet.gr OpenPGP public key ID: pub 1024D/1D038E97 2003-07-13 Vangelis Koukis <vkoukis@cslab.ece.ntua.gr> Key fingerprint = C5CD E02E 2C78 7C10 8A00 53D8 FBFC 3799 1D03 8E97 Only those who will risk going too far can possibly find out how far one can go. -- T.S. Eliot
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