zfs discuss - Feb 2007 - snapdir visable recursively throughout a dataset

Is there an existing RFE for, what I''ll wrongly call, "recursively
visable snapshots"?  That is, .zfs in directories other than the dataset
root.

Frankly, I don''t need it available in all directories, although
it''d be nice, but I do have a need for making it visiable 1 dir down
from the dataset root.  The problem is that while ZFS and Zones work smoothly
together for moving, cloning, sizing, etc, you can''t view .zfs/ from
within the zone because  the zone root is one dir down:

/zones   <-- Dataset
/zones/myzone01  <-- Dataset, .zfs is located here.
/zones/myzone01/root <-- Directory, want .zfs Here!

The ultimate idea is to make ZFS snapdirs accessable from within the zone.

benr.
 
 
This message posted from opensolaris.org

Hello Ben,

Monday, February 5, 2007, 11:03:37 AM, you wrote:

BR> Is there an existing RFE for, what I''ll wrongly call,
BR> "recursively visable snapshots"?  That is, .zfs in directories
other than the dataset root.

BR> Frankly, I don''t need it available in all directories, although
BR> it''d be nice, but I do have a need for making it visiable 1 dir
BR> down from the dataset root.  The problem is that while ZFS and
BR> Zones work smoothly together for moving, cloning, sizing, etc, you
BR> can''t view .zfs/ from within the zone because  the zone root is
one dir down:

BR> /zones   <-- Dataset
BR> /zones/myzone01  <-- Dataset, .zfs is located here.
BR> /zones/myzone01/root <-- Directory, want .zfs Here!

BR> The ultimate idea is to make ZFS snapdirs accessable from within the
zone.

I haven''t tried it but what if you mounted ro via loopback into a zone


/zones/myzone01/root/.zfs is loop mounted in RO to /zones/myzone01/.zfs


?
-- 
Best regards,
 Robert                            mailto:rmilkowski at task.gda.pl
                                       http://milek.blogspot.com

On Feb 5, 2007, at 7:57 AM, Robert Milkowski wrote:
> I haven''t tried it but what if you mounted ro via loopback into a
zone
>
>
> /zones/myzone01/root/.zfs is loop mounted in RO to /zones/ 
> myzone01/.zfs
I''ve tried something similar but found out that vfstab is evaluated  
prior to zpool import, so any lofs directives in vfstab will fail if  
the source of the lofs mount is in ZFS :/

/dale

Robert Milkowski wrote:
> I haven''t tried it but what if you mounted ro via loopback into a
zone
>
>
> /zones/myzone01/root/.zfs is loop mounted in RO to /zones/myzone01/.zfs
>   
That is sooooooooooooooooo wrong. ;)

Besides just being evil, I doubt it''d work.  And if it does, it probly 
shouldn''t.   I think I''m the only one that gets a rash when
using LOFI.

benr.

Ben Rockwood wrote:
> Robert Milkowski wrote:
>> I haven''t tried it but what if you mounted ro via loopback
into a zone
>>
>>
>> /zones/myzone01/root/.zfs is loop mounted in RO to /zones/myzone01/.zfs
>>   
> 
> That is sooooooooooooooooo wrong. ;)
> 
> Besides just being evil, I doubt it''d work.  And if it does, it
probly
> shouldn''t.   I think I''m the only one that gets a rash
when using LOFI.
lofi or lofs ?

lofi - Loopback file driver
	Makes a block device from a file
lofs - loopback virtual file system
	Makes a file system from a file system


-- 
Darren J Moffat

Darren J Moffat wrote:
> Ben Rockwood wrote:
>> Robert Milkowski wrote:
>>> I haven''t tried it but what if you mounted ro via loopback
into a zone
>>>
>>>
>>> /zones/myzone01/root/.zfs is loop mounted in RO to
/zones/myzone01/.zfs
>>>   
>>
>> That is sooooooooooooooooo wrong. ;)
>>
>> Besides just being evil, I doubt it''d work.  And if it does,
it
>> probly shouldn''t.   I think I''m the only one that
gets a rash when
>> using LOFI.
>
> lofi or lofs ?
>
> lofi - Loopback file driver
>     Makes a block device from a file
> lofs - loopback virtual file system
>     Makes a file system from a file system
Yes, I know.  I was referring more so to loopback happy people in 
general. :)

benr.

Hello Ben,

Tuesday, February 6, 2007, 10:19:54 AM, you wrote:

BR> Darren J Moffat wrote:
>> Ben Rockwood wrote:
>>> Robert Milkowski wrote:
>>>> I haven''t tried it but what if you mounted ro via
loopback into a zone
>>>>
>>>>
>>>> /zones/myzone01/root/.zfs is loop mounted in RO to
/zones/myzone01/.zfs
>>>>   
>>>
>>> That is sooooooooooooooooo wrong. ;)
>>>
>>> Besides just being evil, I doubt it''d work.  And if it
does, it
>>> probly shouldn''t.   I think I''m the only one that
gets a rash when
>>> using LOFI.
>>
>> lofi or lofs ?
>>
>> lofi - Loopback file driver
>>     Makes a block device from a file
>> lofs - loopback virtual file system
>>     Makes a file system from a file system
BR> Yes, I know.  I was referring more so to loopback happy people in 
BR> general. :)

What''s wrong with it?
Every sparse zone you''ve got in a system is using lofs anyway.


-- 
Best regards,
 Robert                            mailto:rmilkowski at task.gda.pl
                                       http://milek.blogspot.com