Re: iSCSI draft 02: logout

[somesh gupta <someshg@yahoo.com>]

--- Matt Wakeley <matt_wakeley@agilent.com> wrote:
> Some comments on the logout command:
> 
> - In Section 2.15, it indicates that the logout command is only used
> for error
> recovery.  I thought there were those that wanted to always use the
> logout to
> close a connection cleanly.
> 
> - One would think that a "logout" on the last TCP connection of a
> session
> would close the session.  However, the error recovery steps in
> section 4.1
> seem to imply otherwise.  If closing the last TCP connection of a
> session does
> not close the session, what does?
> 
> - A target should be allowed to "logout" an initiator.  This is
> allowed in
> fibre channel.  It might be nice to have a reason code field
> indicating why
> the logout was performed.

I had proposed (in a coversation with Julain in Pittsburg) a
logout_requested command which the target could send to the initiator,
and the target -- after waiting for some time (the target determines
it)
could then terminate/close any still open connections. 

This feature would avoid entering recovery states (which in my
experience aren't implemented/tested thoroughly) in cases where e.g.
a controller board on a multi-controller array was to be serviced.

Initiators could divert all their traffic to other ports without having
to go through session and command recovery.

Somesh


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