0 Replies Latest reply on May 21, 2018 10:30 AM by lulu62

    Slow storage vMotion (~30 MB/s) in my lab but high speed between Windows pc and storage server

    lulu62 Novice

      Hello All,

       

      I noticed the speed of storage vMotion is quite slow in my config.

       

      I built a lab a small inexpensive lab at home to improve my VMware skills.

       

      I have 2x diskless ESXi 6.5 hosts which are connected to a SAN storage server (ESOS) via FC (4Gbps).

       

      In my storage server I have 3x SATA spinning disks, each configured as their own LUN/datastore.

       

      I've installed vCenter with operations manager (trial).

       

      Now when I move one VM from a datastore to another, it takes quite long, average speed is ~30 MB/s:

       

      Capture.PNG

       

      I did several tests and it seems the performance issue is at the VMware level:

       

      • Enable iSCSI target on storage server and connect my pc (Windows 10 without FC hba) to a newly created LUN. Copy a file to the new NTFS disk, 100 MB/s.
      • Enable iSCSI initiator in one of my ESXi host, connect to the same LUN. Copy a file to the new VMFS datastore via vCenter web interface, 30 MB/s

       

      Looks like something is not optimized in my VMware/ESXi config and I think if i managed to improve iSCSI performance, I'll see the same with FC.

       

      Any idea?