Hello Robert,

Thursday, March 29, 2007, 11:37:48 AM, you wrote:

RM> Hello Matthew,

RM> Thursday, March 29, 2007, 2:23:38 AM, you wrote:

MA>> Robert Milkowski wrote:
>>> Hello zfs-discuss,
>>> 
>>> What will happen if I create a stripe pool of 3 disks, then create
>>> somy symlinks and then overwrite one disk with 0s.
>>> Ditto blocks should self-heal meta data so file systems will be
>>> consistent. Now when it comes to symlinks...
>>> 
>>> I was looking into a ZFS code and it looks like if symlink dst name is
>>> less than 56 in size it will be stored in znode bonus buffer so it
>>> will be protected by ditto blocks and such symlinks should survive
>>> above scenario. However if symlink dst name is longer than 56 bytes it
>>> will be stored in a data block so I guess I won't be able to read it,
>>> right?

MA>> That's correct.  See also

MA>> 6516171 zpl symlinks should have their own object type

MA>> The new object type would be marked as metadata, and thus always be 
MA>> ditto'ed.

RM> That's really interesting! Is someone currently working on it? Any
RM> time frame? I would be really interested in this feature.


RM> btw: what about corner cases when you have a file systems with 100's
RM>      million of symlinks and basically nothing more. If above would be
RM>      on by default (and I guess one couldn't switch it off) in such a
RM>      case fs will consume 2x space additional to lets say underlaying
RM>      mirror - not everyone would be pleased I guess...

RM>      ??

But metadata are compressed so probably it will consume less space...
right?

-- 
Best regards,
 Robert                            mailto:[EMAIL PROTECTED]
                                       http://milek.blogspot.com

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