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  • 1.  NVME TCP/IP vs iSCSI

    Posted Dec 05, 2023 02:59 PM

    I am just wondering about NVME TCP technology vs iSCSI. I have set it up in lab environment and while there are no that much difference when i perform storage vMotion iSCSI is much faster

    I have 2 hosts added as iSCSI and two hosts in different cluster that are added to storage as NVME TCP.  Storage vMotion is much faster with iSCSI storage is Dell PowerStore 1200 T

     

    That comes as a surprise as NVME is supposed to be faster

     



  • 2.  RE: NVME TCP/IP vs iSCSI

    Broadcom Employee
    Posted Dec 06, 2023 08:06 AM

    I would check esxtop, not sure why, but it could be that with iSCSI the "vaai primitives" are used and with NVMe over TCP they are not. Look at the xcopy. ~Some hints of how to check it here:

    https://communities.vmware.com/t5/vSphere-Storage-Discussions/How-to-determine-if-xcopy-is-being-utilized-for-storage-vmotions/td-p/2211743