Identical Processor Limitations On VMWare Hosts

cnfuzzdcnfuzzd Member Posts: 208
Hello Everyone

Is this still a thing? I couldn't confirm it one way or another. Perhaps a better phrasing would be "What are the practical limitations of having different processors in vSphere hosts?" There, that sounds plenty technical.

Thanks!

John
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Comments

  • dave330idave330i Member Posts: 2,091 ■■■■■■■■■■
    Among same vendor or different vendor?

    If same vendor, HA will work, but vMotion won't unless EVC is enabled.

    If different vendor, HA will work, but vMotion won't.
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  • jibbajabbajibbajabba Member Posts: 4,317 ■■■■■■■■□□
    It is very much so a thing ... Even if you buy two seemingly identical CPUs, there still might be differences in steppings and you will end up with an incompatibility which is enough to make vmotion impossible. I had two 56xx CPUs here which have the exact same writing on it but when using certain tools it turns out that some instruction sets are different. Based on Intel one of the CPUs had a "service pack" which added some additional features.

    We had to return both CPUs and buy a "matched pair" ..

    Oh and in our case EVC didn't even work...
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  • dave330idave330i Member Posts: 2,091 ■■■■■■■■■■
    jibbajabba wrote: »
    It is very much so a thing ... Even if you buy two seemingly identical CPUs, there still might be differences in steppings and you will end up with an incompatibility which is enough to make vmotion impossible. I had two 56xx CPUs here which have the exact same writing on it but when using certain tools it turns out that some instruction sets are different. Based on Intel one of the CPUs had a "service pack" which added some additional features.

    We had to return both CPUs and buy a "matched pair" ..

    Oh and in our case EVC didn't even work...


    Did you EVC it to a lower level?
    2018 Certification Goals: Maybe VMware Sales Cert
    "Simplify, then add lightness" -Colin Chapman
  • cnfuzzdcnfuzzd Member Posts: 208
    Thanks for the responses guys. So if we have a mix of host processors, how do you move a vm from one host to a host with a different type of processor?

    Thanks!

    John
    __________________________________________

    Work In Progress: BSCI, Sharepoint
  • iBrokeITiBrokeIT GICSP, GCIP, GXPN, GPEN, GWAPT, GCFE, GCIH, GSEC, CySA+, Sec+, eJPT Member Posts: 1,294 ■■■■■■■■■□
    Cold migration
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