> -----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