On Apr 7, 2009, at 16:43, OpenSolaris Forums wrote:
if you have a snapshot of your files and rsync the same files again, you need to use "--inplace" rsync option , otherwise completely new blocks will be allocated for the new files. that`s because rsync will write entirely new file and rename it over the old one.
not sure if this applies here, but i think it`s worth mentioning and not obvious.....
With ZFS new blocks will always be allocated: it's copy-on-write (COW) file system.
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