> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of (IBM Mainframe 
> Discussion List)
>  
>  
> In a message dated 6/3/2008 11:31:03 A.M. Central Daylight 
> Time, [EMAIL PROTECTED] writes:
> >there were some early -13 (& -23) literature showing  90percent
> cache hit rate. i pointed out that the example was actually  
> 3880 with 10 records per track and reading sequentially.
>  
> I remember a SHARE session in which a control unit guru from 
> IBM-TUCSON described the wonderful new DASD Fast Write 
> feature of the 3990 (AUG 1993, I think).  She told the 
> audience that IBM had done extensive modeling and was 
> convinced that 4MB would be enough NVS for all possible 
> workloads.  But  just in case it wasn't, IBM was making 8MB 
> also available as its maximum  possible NVS size.

And what's the "ho-hum" size nowadays?  :-)

    -jc-

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