Hello Bob,
Wednesday, April 1, 2009, 7:14:46 PM, you wrote:
BF> On Wed, 1 Apr 2009, Matthew Ahrens wrote:
>>>
>>> So from a user perspective isn't it a little bit confusing as he
>>> managed to write more data than he thinks he is allowed to.
>>
>> Pleasant surprises tend to be tolerated :-)
BF> Until it comes time to back that data up. It is conceivable for users
BF> to create a "DOS" for the backup system by intentionally creating many
BF> huge files which compress perfectly with ZFS, but not so perfectly for
BF> backup (assuming that backup even supports compression).
c'mon - they can do it anyway even with file system with no built-in
compression as they can use any external program to compress their
data. And if you are really worried about it then do not use
compression in zfs.
Not to mention that such a case is rather unrealistic (well, maybe
except dd if=/dev/zero).
--
Best regards,
Robert Milkowsk
http://milek.blogspot.com
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