Re: iSCSI Naming: WWUIs, URNs, and namespaces

["Thomas McSweeney" <rf42tpme@us.ibm.com>]

Brian,

>Are "initiators" being connected to actively by "targets"?
>Via some call back or something?

Not that I know of.  The target has to map each initiator that is logging
in to a particular SCSI resource (or set of resources), which may be
different for each initiator.  For example, suppose you have an iSCSI
target node with disk space carved up evenly between two users.  When you
log in to that target, you want to be given access to your disk space
allocation, not mine.  The initiator identifies itself to the target via
the InitiatorWWUI text key of the Login.  The current spec declares that
InitiatorWWUI is globally unique, which makes this mapping easy.  If
InitiatorWWUI is unique only within the initiator node, multiple initiator
nodes can choose the same name (e.g., "WindowsLaptop").  We'll have to
qualify it with something else to make it unique, at least to a target that
uses that name to look up the mapping.

Tom McSweeney
iSCSI Development, Storage Systems Group, IBM
Email: rf42tpme@us.ibm.com
Phone: (USA) 919-254-5634  (tie line: 444-5634)
Fax:   (USA) 919-254-0391  (tie line: 444-0391)