RE: Professional opinions: JRNRCV in separate ASP

Justin,

There are two main benefits to having the journal receiver on a separate
ASP.

1) Performance
2) Redundancy

The performance benefits come into play when you have a journal
receiving very large numbers of transactions and the system disk is
already relatively busy.

The redundancy benefits are from the fact that losing two disks from
your system ASP could cause data loss.  With the journal receiver in
another ASP you can recover the lost data.

Though this redbook is a little dated, I feel its conclusions should
still be applicable.  The only real change from then to now is the
processing power and thus how much you could push through w/o separated
journals vs. having separated journals.

http://www.redbooks.ibm.com/abstracts/sg246286.html?Open

Questions to ask yourself, what does your current config look like,
particularly MAX and AVG busy for disks and controllers vs. what your
planned configuration will be.

If this is a new system coming in, consider benchmarking it both ways.

HTH,


Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx 
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Haase, Justin C.
> Sent: Monday, January 30, 2006 9:06 AM
> To: Midrange Systems Technical Discussion
> Subject: Professional opinions: JRNRCV in separate ASP
> 
> Good morning, all.
> 
> Curious as to the current "state of the systems," so to speak 
> - back in
> the day it was common practice to put journal receivers in a separate
> ASP as to not affect the disk of the system ASP.
> 
> So my question is - how's everyone setting up new environments these
> days?  With the speedier disk is it really making that large of a
> difference?  Is it better just to add the disks you'dve used in the
> second ASP to *SYSBAS and benefit from the additional arms and space?
> Thoughts?
> 
> 
> --
> Justin C. Haase - iSeries System Engineer
> IBM Certified Systems Expert - eServer i5
> Kingland Systems Corporation
> 
> 
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