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  2. JAVA400-L
  3. July 2004

Re: framework question

On Tuesday 06 July 2004 20:03, Nathan Andelin wrote:
> Lloyd,
> 
> How would OS/400 commitment control procedures help when the power goes off?
> If a standard file update is interrupted by a power failure, couldn't a
> journaling or commit operation also be interrupted?  
> 
> Nathan.
> 
        The OS decides when to actually write data to disk, not the user.  With 
commitment control, the OS will not return control to the user's program 
until the data is physically written in permanent media ( or at least the 
journal is written, so the data can be recovered at IPL)  

"Permanent Media" can be the real disk, or a battery backed internal cache.

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