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xen-users
[Xen-users] Re: OT: Re: multiple iscsi targets on bonding interface
Christopher Chen <muffaleta@xxxxxxxxx> writes:
> My idea for next time is to use dm-multipath on the Dom0 that uses
> friendly names associated with scsiSN set on IET on the target --
> namely, I provision a lun on the target, give it a unique scsiSN,
> then with dm-multipath friendly name mapping, I associate that
> scsiSN with, for instance, /dev/mpath/target.guest.root for whatever
> you want, that way I can refer to the friendly names in my DomU
> configs and all I have to do is manage a single list that gets
> propagated via cfengine or whatever.
We do something very similar with our FC based domUs: the multipath
config chooses aliases based on the wwid of the LUN; the corresponding
aliases are extracted by an EMC specific utility from the SAN and
massaged into a multipath config by a home-made one-liner.
For our iSCSI the redundancy is provided by the network level, so
multipath isn't necessary, and udev achieves a convenient persistent
naming by default.
--
Cheers,
Feri.
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