Re: framework question

[Dieter Bender <dieter.bender@xxxxxxxxxxxx>]

On Montag, 5. Juli 2004 21:14, Joe Pluta wrote:
> > From: Franco Biaggi
> >
> > Could you please explain me how to build a transaction that involve
> > multiple files updates without journaling ?
>
> We don't "build transactions" on the iSeries, Franco.  We update the
> records.  That's because THE ISERIES DATABASE DOES NOT CRASH.  So, if I
> need to update three records, I update them.

Joe, you are ok??? the problem is not a crashing machine, the problem are 
conflicts of concurrent processes trying to write to the same database, 
trying to update the same records.

>
> Remember, I could always do my own journaling.  If this was some sort of
> super-critical update that required ultimate security, I could read the
> records, write the before images to a safe place, update the records,
> then clear the before images.  In effect, I could do my own commitment
> control.  

I would never rely on home written commitment controll and journaling, written 
by people, who are thinking, that a crashing machine is the problem!!!

Dieter Bender

> But why do you think you need commitment control?  Who has
> told you this is a requirement?  When have you ever seen an iSeries fail
> to write to disk?
>
> Remember, the iSeries can lose a disk drive and still keep running.
> This is why I don't use other machines than the iSeries for my database.
>
> Joe
>
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-- 
mfG

Dieter Bender


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