Re: Load source on separate vFC/NPIV adapter

My apologies, I didn't read the whole statement until after I
hit send.

I have never seen such an imbalance in I/Os to UNIT1 versus
other units in ASP1 where using a separate fibre adapter or port
would provide a benefit. I would suggest if this really does
something for you, there is something going on which needs
investigation.

Sue Baker <smbaker@xxxxxxxxxx>
wrote on Tue, 13 Sep 2016 18:35:39 GMT:

This really doesn't apply much to IBM i. Load source is simply
one of many disk units in ASP1. You cannot start IBM i with
only the load source present. Except if you are only trying to
get to DST.

This is unlike AIX, Linux, or VIOS which have a single disk to
boot from which also contains paging space (normally). Paging
space requires excellent performance and so isolating it from
other disk in use may help performance. But there are many
additional variables which can impact positively or negatively
the performance.


Tsvetan Marinov
<tsetso.marinov@xxxxxxxxx> wrote
on Tue, 13 Sep 2016 15:58:06 GMT:

Hi all,
In the latest PowerVUG webinar, there was a recommendation to
isolate the load source only on a separate vFC adapters,
apart from all other LUN's in SYSBAS. The recommendation
suggest better performance. Has anyone seen such an
implementation in real and if yes, do you find the
performance considerably better?