Is it possible to setup custom prio number of multipath devices from the OS side?

Solution Unverified - Updated -

Issue

  • Is it possible to setup custom prio number of multipath devices from the OS side?
  • The user wants to setup this number like below.
    Before

    $ multipath -ll
    mpatha (36006016069603000XXXXXXXXXXXXX) dm-0 xxx,xxx
    size=100G features='0' hwhandler='1 emc' wp=rw
    |-+- policy='round-robin 0' prio=1 status=active
    | `- 1:0:0:0 sda 8:0  active ready  running
    |-+- policy='round-robin 0' prio=1 status=enable
    | `- 0:0:0:0 sdb 8:16 active ready  running
    |-+- policy='round-robin 0' prio=0 status=enabled
    | `- 1:0:1:0 sdc 8:32 active ready  running
    `-+- policy='round-robin 0' prio=0 status=enabled
      `- 0:0:1:0 sdd 8:48 active ready  running
    

    After

    mpatha (36006016069603000XXXXXXXXXXXXX) dm-0 xxx,xxxx
    size=100G features='0' hwhandler='1 emc' wp=rw
    |-+- policy='round-robin 0' prio=3 status=active
    | `- 1:0:0:0 sda 8:0  active ready  running
    |-+- policy='round-robin 0' prio=2 status=enabled
    | `- 0:0:0:0 sdb 8:16 active ready  running
    |-+- policy='round-robin 0' prio=1 status=enabled
    | `- 1:0:1:0 sdc 8:32 active ready  running
    `-+- policy='round-robin 0' prio=0 status=enabled
      `- 0:0:1:0 sdd 8:48 active ready  running
    

Environment

  • Red Hat Enterprise Linux 5, 6
  • device-mapper-multipath

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