Il 09/03/2012 09:20, Chris Wedgwood ha scritto: > for preallocated files this will punch holes all over the place and > reallocation will cause fragmentation (guests will free and reallocat > blocks normally)
SEEK_HOLE could provide a very simple heuristic to detect preallocated files (unfortunately ext4 does not implement SEEK_HOLE yet). > xfs has a mechanism to convert to unwritten extents that would avoid > that, but it's not implemented in other filesystems Interesting, thanks! Paolo
