Iād add that VIO was always said to simulate a device and therefore was quite an expensive way of doing Data-In-Memory.
Having said that, it might be the only option. Cheers, Martin (who wrote VIOTOES LIST3820 in the late 1980ās). š From: IBM Mainframe Discussion List <[email protected]> on behalf of Jim Mulder <[email protected]> Date: Wednesday, 5 June 2024 at 20:21 To: [email protected] <[email protected]> Subject: [EXTERNAL] Re: VIO in 2024 It is a way to use real storage to avoid I/O for applications that don't do that on their own. So, yes, as long as you have enough real storage so that VIO use does not result in paging. If the VIO data is getting paged out, you would usually be better off using ordinary I/O than paging I/O. Paging I/O uses a 4K block size, which is inefficient for FICON, unless you are using zHPF. z/OS has not enhanced its paging I/O to use zHPF. With non-paging I/O, you can use a larger block size, and many of the access methods use zHPF. Jim Mulder -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Mark Jacobs Sent: Wednesday, June 5, 2024 8:42 AM To: [email protected] Subject: VIO in 2024 Does sending small datasets to VIO sill make sense in 2024? The Ministry of Silly Questions thanks you in advance for your reply! Mark Jacobs Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email. GPG Public Key - https://api.protonmail.ch/pks/lookup?op=get&[email protected] ---------------------------------------------------------------------- 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 Unless otherwise stated above: IBM United Kingdom Limited Registered in England and Wales with number 741598 Registered office: PO Box 41, North Harbour, Portsmouth, Hants. PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
