>
>I would guess that this is caused by different st_dev values in the new
>filesystem. In such a case, mv copies the files instead of renaming them.
No, it's because they are different filesystems and the data needs to be
copied; zfs doesn't allow data movement between filesystems within a pool.
The code inside "mv" would immediately support such renames as it *first*
checks whether rename works and only then will it try "plan B":
if (rename(source, target) >= 0)
return (0);
if (errno != EXDEV) {
/* fatal errors */
}
... continue with plan B: copy & remove ...
Casper
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