--- James Smart <James.Smart@xxxxxxxxxx> wrote:
> Here's one pro for setting WWNs at arbitrary times...
> If the box is migrating applications (say containers) that want
> different SAN connectivity, where that connectivity (view) is based
> on their WWN, it would be really nice to selectively set the WWN and
> not touch the SAN config.
No. The WWN stays the same and the SAN is re-configured to be
aware of the node migration. Access patterns could be more
complex than just a single portal allowing access to/from the
SAN from/to the node.
WWN is supposed to be persistent. This is what it actually is.
It is NOT supposed to be "(auto)generated" and/or changed at a whim.
This also has security implications, and enterprise networks may
refuse to use software (read "kernel") which allows for arbitrary
changes to a node's WWN.
If access to a node is compromised, a rogue agent may change
the node's WWN in order to access SAN zones that it normally
will be denied access to.
Luben
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