the exponential file system from hell

[Attila Nagy]

It's just meant to be funny, sorry if you find it insulting.

On 09/27/13 15:05, Steven Hartland wrote:
> Pro tip don't use an insulting subject if your looking for help.
>
>    Regards
>    Steve
> ----- Original Message ----- From: "Attila Nagy" <bra at fsn.hu>
> To: <freebsd-fs at FreeBSD.org>
> Sent: Friday, September 27, 2013 1:29 PM
> Subject: zfs: the exponential file system from hell
>
>
>> Hi,
>>
>> Did anyone try to fill a zpool with multiple zfs in it and graph the 
>> space accounted by df and zpool list?
>> If not, here it is:
>> https://picasaweb.google.com/104147045962330059540/FreeBSDZfsVsDf#5928271443977601554 
>>
>>
>> The zpool in question:
>>         NAME        STATE     READ WRITE CKSUM
>>         mnt         ONLINE       0     0     0
>>           raidz2-0  ONLINE       0     0     0
>>             da1     ONLINE       0     0     0
>>             da2     ONLINE       0     0     0
>>             da3     ONLINE       0     0     0
>>             da4     ONLINE       0     0     0
>>           raidz2-1  ONLINE       0     0     0
>>             da5     ONLINE       0     0     0
>>             da6     ONLINE       0     0     0
>>             da7     ONLINE       0     0     0
>>             da8     ONLINE       0     0     0
>>           raidz2-2  ONLINE       0     0     0
>>             da9     ONLINE       0     0     0
>>             da10    ONLINE       0     0     0
>>             da11    ONLINE       0     0     0
>>             da13    ONLINE       0     0     0
>>
>> And the zfs-es on it:
>> NAME     USED  AVAIL  REFER  MOUNTPOINT
>> mnt     23.3G      0  53.8K  /mnt
>> mnt/p1  3.89G      0  3.89G  /mnt/p1
>> mnt/p2  3.89G      0  3.89G  /mnt/p2
>> mnt/p3  3.89G      0  3.89G  /mnt/p3
>> mnt/p4  3.89G      0  3.89G  /mnt/p4
>> mnt/p5  3.89G      0  3.89G  /mnt/p5
>> mnt/p6  3.89G      0  3.89G  /mnt/p6
>>
>> I have evenly filled the six zfs in 1/100th percents of the full 
>> space available, and graphed the results of zpool list's capacity and 
>> df's capacity.
>> The x scale is the real space usage in percents.
>>
>> It's quite annoying when df says the file systems are 20% full, while 
>> in reality, they are at 60%.
>>
>> Any chance that it will be solved?
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>>
>
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