I'm sure VTS does compress data even though I think it's a hardware feature and at application level (zOS channel program I mean) there's no difference in terms of EXCP. In the worst case we could expect a bigger connect time anyway VTS is faster than SMS compressed DASD despite of the number of EXCPs.
Regards. Massimo 2015-05-05 17:07 GMT+02:00 Elardus Engelbrecht < [email protected]>: > Massimo Biancucci wrote: > > >Output - Compressed Dataset > >STEPNAME PROCSTEP RC EXCP CPU SRB CLOCK SERV PG PAGE > SWAP > > ST040 00 1247K 8.65 .79 23.77 38592K 0 0 > 0 > > >Output - DUMMY > >STEPNAME PROCSTEP RC EXCP CPU SRB CLOCK SERV PG PAGE > SWAP > > ST040 00 201K 1.10 .04 2.24 4725K 0 0 > 0 > > >Output - Virtual Tape Dataset > >STEPNAME PROCSTEP RC EXCP CPU SRB CLOCK SERV PG PAGE > SWAP > > ST040 00 3730K 1.19 .20 8.86 7476K 0 0 > 0 > > >What is not so clear to me is why the elapsed time does grow so much even > though there's no CPU constraint. > > >Because of the lower number of EXPCs I'd been expecting something less in > terms of elapsed or something similar. > > VTS has more EXCP. Wild guess - Does your VTS do hardware compression > despite your software compression? > > Groete / Greetings > Elardus Engelbrecht > > ---------------------------------------------------------------------- > 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
