Exactly. Use zPDT or Hercules with zVM 5.3 Evaluation Edition, https://www.vm.ibm.com/eval/
copy applications to Linux on Z and recompile to prove they produce the same results then stress test to show performance then try on used real hardware (will it work with their existing storage?) On Sat, Oct 25, 2025 at 7:25 PM Steve Thompson <[email protected]> wrote: > I'd ask why aren't they running z/VM rather than z/OS? > > But if I were in IBM sales, I would ask one of the z/VM gurus in > IBM how many Linux images I could get running in an LPAR. I would > want them to run a benchmark against a VMware server to see what > the through put ability is between z/VM and Intel/AMD... > > And then I'd ask questions about I/O through put, so I could show > (if it is true) that they could turn off file caching in Linux as > the z/VM system and all the controllers would cache better and > faster.... > > But that's me having to take care of (as a cap planner) 3 LPARs > running Linux servers at a large insurance company. > > Regards, > Steve Thompson > > > On 10/25/2025 11:16 AM, Jon Perryman wrote: > > On Fri, 24 Oct 2025 16:23:05 +0000, Dick Williams < > [email protected]> wrote: > > > >> Why would IBM want to sell a mainframe (zOS) to Google? > >> Do they process important transactions? > > This mindset has doomed z/OS. These are the wrong questions. IBM > (International Business Machines) wants to sell to all businesses. > > > > Not all businesses are about important transactions. Instead, ask why > isn't Google replacing their 5M Linux servers with 250,000 z/OS servers? > What business problems does IBM solve that are important to Google? > > > > A single Google search moves hundreds of strings. The z MVST (move > string) is a single instruction residing in cache. On the other hand, the > STRCPY() function for other architectures is several instructions that > reside in storage and must be moved to cache as needed. > > > > A Google search is heavy disk access. MVS has been running as a NAS > since the 1960s. > > > > Google developed GO 15 years ago but missed important and simple > features (e.g. recently discussed PRINTF compile time type validation). > > > > You get what you pay for and Google pays $0 for Linux, GCC and others. > > > > Linux is looking to eliminate big endian support despite it being of > little impact to Linux. Most endianess is handled by hardware instructions > and is very little impact to programs. > https://www.phoronix.com/news/Torvalds-No-RISC-V-BE > > > > ---------------------------------------------------------------------- > > 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 > -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
