ESXi

 View Only
Back to discussions
Expand all | Collapse all

VM disk controllers throughput

  • 1.  VM disk controllers throughput

    Posted Jan 21, 2022 11:06 AM

    Hello,

    We have storage Dell MD3220 SAS, RAID6 (16*HDD 10K) and HPE host ESXi 6.7U3

    we need to get the maximum performance for sequential reading with 1MB block size and QueueDepth=1.

    I have tested various controllers for virtual machines to determine the maximum read throughput (burst rate):

    esxi_vm_controllers.png

    I am very surprised that the SATA controller has the maximum bandwidth at 1MB block size (and very low throughput for LSI Logic SAS).

    Is there an explanation for this behaviour?