What's wrong with snapshot?

What's wrong with snapshot?

[Shen Feng]

Hello, 

I tried to ceate a snapshot of a subvol.
But it seems now work.

Please see the test below. I think the file created by dd
should also in the snap directory.

[root@localhost mnt]# ./test2.sh 
+ mkfs.btrfs /dev/sdb8
fs created label (null) on /dev/sdb8
	nodesize 4096 leafsize 4096 sectorsize 4096 size 18.63GB
Btrfs v0.16-35-g6e0e6df-dirty
+ btrfsctl -a
Scanning for Btrfs filesystems
+ mount -t btrfs /dev/sdb8 /mnt/btrfs
+ cd /mnt/btrfs
+ btrfsctl -S sub /mnt/btrfs
operation complete
Btrfs v0.16-35-g6e0e6df-dirty
+ btrfsctl -s snap /mnt/btrfs/sub
operation complete
Btrfs v0.16-35-g6e0e6df-dirty
+ dd if=/dev/zero of=/mnt/btrfs/sub/file bs=1024 count=1024
1024+0 records in
1024+0 records out
1048576 bytes (1.0 MB) copied, 0.0208993 s, 50.2 MB/s
+ ls -a snap sub
snap:
.  ..

sub:
.  ..  file
+ cd ..


Anything wrong?
Thanks

-Shen

Re: What's wrong with snapshot?

[Yan Zheng]

2009/1/8 Shen Feng <shen@cn.fujitsu.com>:
> Hello,
>
> I tried to ceate a snapshot of a subvol.
> But it seems now work.
>
> Please see the test below. I think the file created by dd
> should also in the snap directory.
>

This is the expected behaviour.  Following link describes what
snapshot is.

http://en.wikipedia.org/wiki/Snapshot_(computer_storage)

Yan Zheng

Re: What's wrong with snapshot?

[Shen Feng]

thanks. I got it.

Shen

on 01/08/2009 07:49 PM, Yan Zheng wrote:
> 2009/1/8 Shen Feng <shen@cn.fujitsu.com>:
>> Hello,
>>
>> I tried to ceate a snapshot of a subvol.
>> But it seems now work.
>>
>> Please see the test below. I think the file created by dd
>> should also in the snap directory.
>>
> 
> This is the expected behaviour.  Following link describes what
> snapshot is.
> 
> http://en.wikipedia.org/wiki/Snapshot_(computer_storage)
> 
> Yan Zheng
> 
>