Re: Null files reloaded :-)

[David Sparks <daves@xxxxxxxxxxxxxxx>]

What happens when an existing file is changed and only the metadata is 
sync'd?

I'm curios as to what happens in this situation:

open existing file
seek xxx
write data
[filesystem brought uncleanly offline]


The real world example is database files.  What happens if a busy mysql 
database making a lot of inserts has the fs brought down uncleanly?  Are 
sections of the file nulled or is the entire file nulled?

Thanks,

ds

ps I have XFS running on ~20 servers and have been very happy with it.  
Thank you for your hard work, it is appreciated!

I think that this + the earlier thread should be distilled into a few 
FAQ entries as it is useful knowledge, and surely to come up again. :)