[Asterisk-Users] MeetMe Features

[Christopher L. Wade]

Leif Madsen wrote:
>>You need to make sure that the temporary file is stored on the same device
>>as the actual spool file. Otherwise the 'mv' below will not be atomic.
>>/var/spool is not unheard of to have on it's own partition. Just a heads
>>up.
> 
> 
> I don't think I quite understand.  Even if it is on a different
> partition, the path should still be the same should it not?
> /var/spool should still work whether it is on /dev/hda2 or /dev/hda5 ?
> 

What he is saying here, is that a 'mv' across multiple partitions, which 
to the file-system, could be multiple devices, is not as simple as 
moving a pointer.

For a 'mv' across partitions/disks, the file has to be 'copied' to the 
new location and then 'removed' from the old location.  For a 'mv' 
inside the same partition, the pointer in the file-system is simply 
changed, and you're done.  Thus a 'mv' across partitions is not atomic, 
and a 'mv' inside the partition is.

Chris

PS. I hope I'm not off on this.

-- 
Christopher L. Wade                     Unistar-Sparco Computers, Inc.
Senior Systems Administrator                            dba Sparco.com
Email: clwade at sparco.com                             7089 Ryburn Drive
Phone: (901) 872 2272 / (800) 840 8400            Millington, TN 38053
Fax:   (901) 872 8482                                              USA