On Fri, 2006-01-13 at 09:41 -0800, K Chapman wrote:
> --- Arne Redlich <agr@xxxxxxxxxxxxxx> wrote:
>
> > Am Mittwoch, den 11.01.2006, 14:49 -0800 schrieb K
> > Chapman:
> > > > so this is aix ini fault i think, it claims it
> > can
> > > > support MaxRxDSL
> > > > (this is its capability) while assume target
> > accept
> > > > this param means
> > > > target also has this capability. :P
> > > >
> > > > is it possible for you to file a bug ticket to
> > aix?
> > > >
> > > > i know this is not follow the RFC, but can u try
> > to
> > > > specify that
> > > > parameter to 256K in your conf file, without
> > that
> > > > patch, and see if ok?
> > > >
> > > > i think the patch has no harm to IET code, but
> > might
> > > > lead to OOM in low
> > > > HW configuration box.
> > >
> > > ive tried at 256k and it works still. ibm
> > actually
> > > called me on my ticket and they are going to talk
> > to
> > > the iscsi developers!!! wow... if anyone has any
> > > other suggestions for ibm, let me know as ill try
> > to
> > > get them to listen to make the config for aix a
> > bit
> > > more flexiable/compliant.
> >
> > Yes, you should mention the CmdSN issue if you don't
> > have it on your
> > list already. While this shouldn't be a problem with
> > AIX vs. IET anymore
> > due to the workaround, it could lead to problems
> > with targets actually
> > using a dynamic CmdSN window.
> >
> > Arne
>
> here is some of what one of the iscsi dev guys at ibm
> said:
>
> It appears you are correct about the MaxCmdSN and
> ExpCmdSN. If they are equal, that should mean we have
> a command queue depth of one. But it looks like our
> iSCSI driver has an off-by-one-error when determining
> if the command queue is full. I assume that after the
> login, there is a delay of a minute or so before the
> connection is closed and restarted. Is that the case?
yes, that is the case.
> Do you actually have a target that wants to use a
> command queue depth of just 1? Most have anywhere from
> 16-128 or more and so we had not hit this before. BTW,
> what iSCSI target are you using?
we did not adjust that until FFP. now we adjust that to 2 before FFP.
>
> As for the configuration, we curently do not have
> definite plans for extending it, though I have some
> ideas of what I would like to add and I have had a few
> (but not many) other customers make similar comments.
> I will add it to our list of enhancements to consider
> but don't expect any short-term changes.
>
> We don't have any particular tools that we recommend.
> Some of our stuff is for internal use only, though
> there is at least one publicly available tool that we
> use for file system stress....a program called "dt".
> One place you can get it is from the website for
> "connectathon"....www.connectathon.org. Find the test
> suite for iSCSI and it contains "dt".
i see. i have dt.
>
> aaarrrggghhh!!!!
> FreeBSD rocks
>
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