> -----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-
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
