kern/177985: [zfs] disk usage problem when copying from one zfs dataset to another on the same pool using mv command

[Steven Hartland]

The following reply was made to PR kern/177985; it has been noted by GNATS.

From: "Steven Hartland" <smh at freebsd.org>
To: <bug-followup at freebsd.org>,
	<sybersnake at gmail.com>
Cc:  
Subject: Re: kern/177985: [zfs] disk usage problem when copying from one zfs dataset to another on the same pool using mv command
Date: Sat, 20 Apr 2013 18:30:26 +0100

 Deletes / frees are lower priority than standard writes / reads so its
 quite possible in the scenario you describe that you could run out of space.
 
 Could you please confirm the exact behaviour by allow mv to process a
 number of files, before suspending and seeing if the free space is correct
 for the current progress after waiting for the pool to sync all outstanding
 requests.
 
     Regards
     Steve