RE: 24/7 questions:

[ORiordan_Paudie@xxxxxxx]

I have failed over to the second mirrored system on my own site when our
production server fell over a few years ago
system 
I was up and running for the users within 1 hour

Data Disk and load source is all handled by the Symmetrix product, the
As/400 doesn't even know what the Symmetrix is doing
We use BCV volumes (business continuance volumes) Raid 1 and SRDF solutions,
i.e. we have no internal As/400 drives

We can now SRDF over  IP instead of fiber so I could in theory mirror my
entire system hundreds of miles away,
brilliant for Data warehousing, especially if you have one site in lets say
the U.S. and another in Europe, 

Also we us a Data base extractor(Info Mover Database Extractor for As/400)
to dump
our database to unix hosts, the beauty about this, it is all handled by the
disk subsystem, no host interaction at all
checkout 
http://www.emc.com/products/software/infomover.jsp?openfolder=storage_softwa
re
 

-----Original Message-----
From: Bob Larkin [mailto:blarkin@wt.net]
Sent: 10 June 2000 01:18
To: MIDRANGE-L@midrange.com
Subject: Re: 24/7 questions:


Larry,
Our shop just inherited four AS/400 system with NO DASD. All data storage is
handled by an EMC Symmetrix <sp?> storage system. As you say, it is SCSI
attached, not LAN, but I understand that other systems are LAN attached to
the
same Symmetrix box.

I have investigated IBM's Shark SAN, and it as some interesting features,
but it
needs more work for the AS/400 world. If they would support the AS/400's
optical
link, it would be a good start, but a Giga ethernet conection might work.

One intersting point on the Symmetix. there is no load source on the AS/40s.
The
load source is a virtual drive in the Symmetrix. You can electronically
switch
the virtual DASD from one AS/400 to another, then IPL and the second system
will
be using the same DASD as the first was. They say this works even though the
two
AS/400s are different configurations! That really blows me away. Or confuses
me.
What happens to the mismatches in the configurations? I don't have a clue
how
that is handled. We are just beginning to work on these inherited systems,
so we
don't have all of the information yet.
Bob

Larry Bolhuis wrote:

> Matt,
>
>   If you are truly 24/7 you WILL indeed need to do something to
> accomplish backups.  Most likely a Mirroring product such as
> DataMirror's Transformation Server(*) to another system (or LPAR
> partition) that you can pause while backing up the second machine.  Even
> with this solution though you will need to identify a time WHEN to pause
> the mirroring or you will have a clean backup (from the OS/400
> perspective) but not neccesarily from the applications perspective (ie
> transactions are only partially applied).
>
>   Network Attached storage is not really a player in the AS/400 market
> yet. Currently the only way to attach non 'native' AS/400 storage is
> with 6501 SCSI cards and that really buys you nothing.  Due to Single
> Level Storage architechure it's not likely from my perspective that you
> will see network attached storage any time soon.
>
>   HTH - Larry
>
> (*) We represent DataMirror
>
> Matt Patee wrote:
> >
> > Hello all. I would like to revisit a topic that has come up more than
once.
> > My shop will become a 24/7 shop within the next year, and I would
> > appreciate any and all advice on the best ways to accomplish this.
> > Mirroring servers, high availability software, shared journaling, etc. I
> > would like to know who has 24/7 shop and how they are managing. What are
> > you using for backup, and disaster recovery solutions?
> >
> > Separately I have a questions regarding Network attached storage. Is
anyone
> > using this in conjunction with their 400? Does anyone know if it works?
Is
> > there any documentation I could look into?
> >
> > Any and all help will be appreciated.
> >
> > -Matt
>
> --
> Larry Bolhuis         |  It's 10PM.
> Arbor Solutions, Inc  |  Have you rebooted your NT Server yet today?
> (616) 451-2500        |
> (616) 451-2571 -fax   |
> lbolhuis@arbsol.com   |
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