Re: MULTIPLE AS400'S

[Pat Barber <mboceanside@xxxxxxxxxxxxxxxx>]

MacWheel99@aol.com wrote:
> 
> >  From:    JGracetri@aol.com
> >
> >  IS PASSTHRU THE ONLY WAY TO SHARE DASD BETWEEN BOXES?
> >
> >  we are using ddm and passthru. this is very slow? we have tried tuning bot
> >  very little help there.

DDM requires very careful planning... You CAN NOT just fire up DDM with
an application that runs fine on the 400 and expect the same results
in speed between two machines. Heavy file usage with lots of random
reads will show up as a "slow as a herd of turtles"..

The speed of the connection also has a very heavy bearing on your
results... More is better in this case... Think 512kb for really
good results...

DDM works best when you need to access "small" chunks of data from
other machine, not huge file reads...

Are ther two machines in the same room/building or long distance ???
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