I said in another thread that VIO was one of the worse DIM exploiters for CPU usage - in the Orange "Coffee Table" book of DIM studies way back when.
I've no reason to doubt it now. I would still expect that for many uses it is faster than temporary data sets on disk, though. So I would question what we're optimising for. And I would agree that a rival implementation - such as hiperspace or 64-Bit Memory Object sorting - is worth investigating. Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: [email protected] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/category/mpt/ From: "Vernooij, CP (ITOPT1) - KLM" <[email protected]> To: [email protected] Date: 11/05/2016 15:32 Subject: Re: Whither VIO? Sent by: IBM Mainframe Discussion List <[email protected]> I heard rumors that VIO is that CPU expensive and that I/O is that fast nowadays, that it is VIO is not worth the extra CPU anymore. Therefor I have been thinking about abandoning VIO, but I can't make a good calculation. I could make the calculation for the SAS WORK file, which can be in VIO or in HIPERSPACE. The latter is cheaper, as is stated by SAS and it is easy to switch to Hiperspace with a simple installation parameter. Does anyone has some figures on other use of VIO? Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Martin Packer Sent: 11 May, 2016 16:08 To: [email protected] Subject: Re: Whither VIO? The nasty answer to "what happened to VIO?" is "nothing". :-) :-( Seriously, it remains as before but implemented in central storage rather than expanded. With the improved economics of memory it's worth looking at again - but only if memory is available to support it. Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: [email protected] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/category/mpt/ From: Lizette Koehler <[email protected]> To: [email protected] Date: 11/05/2016 14:55 Subject: Re: Whither VIO? Sent by: IBM Mainframe Discussion List <[email protected]> My guess would be: DASD is faster Virtual Tape is faster Central Memory is plentiful (for some shops) Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Jerry Callen > Sent: Wednesday, May 11, 2016 6:51 AM > To: [email protected] > Subject: Whither VIO? > > In a thread in a distant galaxy, J.O.Skip Robinson wrote: > > > ...be aware that some customers (like us) did away with VIO a long time ago. > > I've been away from MVS for a while. Did something better than VIO come along > while I wasn't looking? Why would VIO have been vaporized? > > -- Jerry > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. 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