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VM Limit IOPs and a question...

  • 1.  VM Limit IOPs and a question...

    Posted Apr 03, 2019 02:03 PM


    i have a problem...

    i have a VM with 2 disks on one datastore for testing Limit IOPS.

    I run SQLIO without limitations

    i got ~ 6000 IO

    Then with limitations:

    c:   SQLIO -> 120 IO

    Shares 1000

    Limit 250

    d:  SQLIO -> 250 IO

    Shares 1000

    Limit 500

    Then i stopped SQLIO on C:

    ans still got 250 IOPS

    Why did i get 50% of the Limit ? and not the limit  or more than the limit ?

    VMWare KB:

    All virtual disks located on one LUN. Each virtual disk IOPs set to 100 IOPs.

    If disks 1, 2, and 3 issue 10 IOPs each, disk 4 could issue 100 IOPs as this is the limit.