Re: Main Storage on new models

[Sue Baker <smbaker@xxxxxxxxxx>]

Ingvaldson, Scott wrote in gmane.comp.hardware.ibm.midrange at
Fri 28 Feb 2003 03:40:33p: 

> They say that the additional memory is needed due to the new
> model and the possibility that we may be moving to ESS (shark)
> external DASD on the new box.
> 

Scott, the rough rule of thumb I advocate for upgrades is to 
increase main storage by the same percentage you are increasing 
your CPW.  So, if CPW is up by 20%, you'd also up main storage by 
20% and ROUND UP to the next valid configuration.  But, you also 
need to understand whether you've always followed this guideline 
and how much extra you may have purchased the last time you 
upgraded.  And all the other performance caveats apply.

As far as needing more main store due to implementing ESS, I'd be 
very surprised.  There is nothing inherent in the ESS and its 
attach to iSeries that requires more main storage.  Maybe your 
sales person is confusing the minimum cache in ESS recommendation 
with iSeries main storage?  

-- 
Sue
iSeries Advanced Technical Support
Rochester, MN