RE: Backup using Save Files

[Don <dr2@xxxxxxxx>]

Ken,

this is interesting.  As I recall the speakers at the iSeries Tech conf 
(and they still refered to it as an AS/400) were suggesting a iASP for 
virt.tape...qualified with standard IBM answer #4 - "it depends...."

BTW, had a GREAT time at the tech conf...food was great! :)  My 
cardiologist was really annoyed with I hit the scales upon my return. :)

Don in DC

At 06:17 PM 5/24/2006 -0500, you wrote:
> An iASP MIGHT help because it separates the I/Os for the virtual tape
> from the rest of the database. This was the recommendation at COMMON
> from the Save/Restore gurus. You have to be careful with this because
> you have to make sure that the iASP has enough disk arms to support the
> I/O rates. Before you ask, nothing has been published yet that I've seen
> to figure out the correct configuration.
>
> Last week I was talking with a couple of folks from IBM's Advanced
> Technical Support and they disagree with this recommendation. Their
> feeling is that spreading the I/Os across all the drives in the system
> would perform better.
>
> In other words, at this point in time I think the support is too new to
> really understand the right way to setup virtual tape.
>
> Kendall Kinnear
> System i5 Architect
> Stonebridge
>
> Direct Telephone Number: 972.419.7709
> Or Toll Free:  800.776.9755 x7709
> Cell Phone Number:  214-676-3146
> Fax Number:  972.455.7260
> Kendall.Kinnear@xxxxxxxx
> http://www.SBTI.com/
> If you are interested in iSeries and application development, follow
> Angus' blog at http://www.angustheitchap.com/
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Evan Harris
> Sent: Wednesday, May 24, 2006 4:03 PM
> To: Midrange Systems Technical Discussion
> Subject: RE: Backup using Save Files
>
> Hi Al
>
> any clue as to why an IASP would have improved things ?
> I would have though the opposite effect would be  more likely.
>
> Regards
> Evan Harris
>
> At 05:27 a.m. 25/05/2006, you wrote:
> >If you use virtual tape improperly, you could execute the WASTE DISK
> SPACE
> >command.  Also, on my little system, I am getting worse performance
> using
> >Virtual Tape than to an ULTRIUM2 tape drive.  If was suggested that we
> put
> >the image catalogue in an IASP to get better performance.  Also I was
> >getting terrible performance going from the virtual tape to the
> ULTRIUM2
> >tape drive, but there's a PTF to fix that.
> >
> >Al
> >
> >Al Barsa, Jr.
> >Barsa Consulting Group, LLC
>
> --
> This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
> list
> To post a message email: MIDRANGE-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/midrange-l
> or email: MIDRANGE-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/midrange-l.
>
>
>
>
> CONFIDENTIALITY NOTICE
>
> This e-mail message, including any attachments, may contain confidential 
> information that is considered privileged. This
>  information is for the sole use of its intended recipient(s). If you are 
> not an intended recipient, or if you have received this
>  transmission in error, please notify Stonebridge immediately at 
> 800-776-9755 in order to arrange for the confidential return of
>  the original documents to us. You are hereby notified that any 
> disclosure, copying, distribution or the taking of any action in
>  reliance on the contents of this transmitted information is strictly 
> prohibited.
>
> --
> This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
> To post a message email: MIDRANGE-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/midrange-l
> or email: MIDRANGE-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/midrange-l.