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  • 1.  how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 04:47 PM

    we have 2 hosts with 10 gig iSCSI links to SAN . (2 per host , jumbo frames enables , no teaming, isolated vlan)

    We are receiving reports of slow read speeds (at the VM level)  after upgrade.


    What is the best / most accurate way that i can measure the throughput of the VM to the SAN?

    Thanks



  • 2.  RE: how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 05:26 PM

    1 question.

    Are you sure that jumbo frames are enabled at the physical switch?

    It´s normal to enable jumbo frames in vswitch but no in physical switch



  • 3.  RE: how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 06:16 PM

    yes 100%



  • 4.  RE: how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 06:28 PM

    What is the upgrade that you did?



  • 5.  RE: how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 06:34 PM

    upgraded the iSCSI to 10 gig .

    installed 10 GIG network adapter in esxi server.



  • 6.  RE: how to measure bandwidth from host to iscsi san

    Posted May 17, 2017 06:43 PM

    The most common is using the esxtop command

    See this kb and try it

    Using esxtop to identify storage performance issues for ESX / ESXi (multiple versions) (1008205) | VMware KB