how configure zoning for VMware to reduce chatter i.e. single zone initators.

Posted on 2008-11-14
Last Modified: 2012-05-05
How configure zoning for VMware to reduce chatter i.e. single zone initiators? VM support is seeing a fair amount of traffic from adjacent initiators and could be partly responsible for a select few VMs (MS 2000 boxes) advertising disk access errors in eventvwr. I tried moving these to local storage and the errors went away. I have other VMs on this SAN and they are fine. Don't know but I do know that we want to isolate the initiator per VM support to reduce chatter.

Question by:minnefornian
    LVL 18

    Expert Comment

    Have you setup your zones according to the iSCSI SAN Configuration Guide?

    Author Comment

    Tags:   Brocade, Silkworm, 200e, FC 4Gb SAN switch  
    LVL 18

    Expert Comment

    Have you tried setting the disk timeout value to 60s (page 102 in the doc I linked above)?

    TimeOutValue (DWORD) to 60

    How many VMs do you have per LUN and how many hosts are connected to each SAN controller? Do you see ongoing high latency values in esxtop?



    Accepted Solution

    it was a setting on the array where AVT (auto vol xfer) was thrashing becaues it would trade ownership with the integrated volume responsibility management built into the Vmkernel. Since the array was not a TRUE active/active, it would make erroneous assumptions that the preferred path was down when it was actually valid and servicing traffic.

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