100 records written & read inbetween alloc & free: DASD: 5.5 mins elapsed 92 secs CPU VIO 73 secs elapsed 65 secs CPU
On 10 March 2017 at 22:48, Tom Marchant < [email protected]> wrote: > On Fri, 10 Mar 2017 21:05:20 +0000, Graham Harris wrote: > > >Being somewhat interested in validating whether VIO still serves a purpose > >in these modern times with super quick DASD, i just ran some mickey mouse > >comparisons, doing 10k allocates/frees of temporary datasets on VIO vs > DASD. > > > >Results tend to imply that the old adage of "the best I/O is no I/O", > still > >appears to hold true. > > > >DASD: Elapsed: 3 minutes CPU: 27 seconds > >VIO: Elapsed 12 seconds CPU: 10 seconds > > For the OP's case, a more interesting test would be > allocate > open output > write a bunch of records > close > open input > read the records > close > free > > -- > Tom Marchant > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
