Punching holes in files
Posted Nov 18, 2010 18:40 UTC (Thu) by nix (subscriber, #2304)
Currently, the backing file still takes up space on the host's filesystem when that is done. It need not. (Possible downside: files with huge numbers of holes scattered through them had a historical propensity to get enormously fragmented, but for VM filesystem images this is probably completely unimportant, as the 'fragmentation' is going to be precisely in line with actual *files* in the contained FS.)
Posted Nov 19, 2010 16:55 UTC (Fri) by ewan (subscriber, #5533)
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