OpenSolaris Forums <no-re...@opensolaris.org> writes:

> if you rsync data to zfs over existing files, you need to take
> something more into account:
>
> 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.....

In the particular case it didn't apply as it was a first time run but
good to know what happens with rsync. 

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