>~zero user down time

Unfortunately ~zero doesn't equal 0. There is a time between the vary-off
and the vary-on on the other machine. It's small, but real. Now IF you have
two machines you could also use some sort of replication software and I'd
buy you're at zero. But to paraphrase Buck's comment about MS, "Every
iSeries needs a friend?"


Walden H Leverich III
Tech Software
(516) 627-3800 x11
(208) 692-3308 eFax

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)

-----Original Message-----
From: Jeff Silberberg [mailto:jsilberberg@mindspring.com] 
Sent: Wednesday, January 29, 2003 9:40 PM
To: Midrange Systems Technical Discussion
Subject: Re: Joe's V5R1 upgrade


    We can do this now.  You setup independant storage pools, and you can
move them from one system to another. so if you have a system ASP, and
everything else in other ASPs 1-n you can vary one off and vary it onto
another box.  It works best with SHARK I think, but was beening demoed at
the Nashville Common last year.

    So, at least in theory.  If you have two systems capable of handling the
workload, you could move all the user area's (storage) to system two and
them update system one with ~zero user down time.


----- Original Message -----
From: "Mark Phippard" <MarkP@softlanding.com>
To: "Midrange Systems Technical Discussion" <midrange-l@midrange.com>
Sent: Wednesday, January 29, 2003 8:35 PM
Subject: RE: Joe's V5R1 upgrade

> As Walden and others have pointed out, with a cluster of Linux or Windows
> systems you can take a system out of the cluster to apply fixes without
> bringing down the cluster and your application.
> I think the iSeries really needs to improve in this area.  As it stands, I
> would have a real hard time recommending the iSeries for someone with high
> availability needs in a "connected world".  The iSeries rocks when it
> to unscheduled downtime, but it is not so great in the area of planned
> downtime.

This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@midrange.com
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo.cgi/midrange-l
or email: MIDRANGE-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.

This thread ...

Return to Archive home page | Return to MIDRANGE.COM home page