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  3. March 2006

RE: Iseries Disk managment

Actually, that would be better justification than JRN in most cases that are using it for backup and have any decent kind of load during production... 

good point dude...

At 02:57 PM 3/14/2006 -0500, you wrote:

And in some cases you may want to then consider a separate ASP for the new
V5R4 virtual tape.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





Don <dr2@xxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
03/14/2006 10:49 AM
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>


To
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
cc

Subject
RE: Iseries Disk managment






Rob,

good point.  I would think that STRASPBAL with some PF/LF file management
and RGZPFM's where appropriate should keep his disk access about as
effecient as it's going to get...  Obviousely you can't let the platters
get too full or you get past the knee of the curve on queueing...and lose
effeciency there...

And, it also depends on what you're doing.  If you're a heavy SAVF or JRN
user, I would suggest you may want to consider a seperate ASP for those
and
that they be on their own spindles and if REALLY heavy perhaps even
further
isolated.

Don in DC



At 09:58 AM 3/14/2006 -0500, you wrote:
>And, years ago, IBM did occasionally recommend an unload/reload to
balance
>the disks.  Did a dandy job.  Hopefully that is well covered by the
>significantly less risky STRASPBAL.
>
>Rob Berendt
>--
>Group Dekko Services, LLC
>Dept 01.073
>PO Box 2000
>Dock 108
>6928N 400E
>Kendallville, IN 46755
>http://www.dekko.com
>
>
>
>
>
>"Jones, John \(US\)" <John.Jones@xxxxxxxxxx>
>Sent by: midrange-l-bounces@xxxxxxxxxxxx
>03/14/2006 09:43 AM
>Please respond to
>Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
>
>
>To
>"Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
>cc
>
>Subject
>RE: Iseries Disk managment
>
>
>
>
>
>
>STR/ENDDSKRGZ; not sure which OS release started offering these.
>Defrags free space only; apparently doesn't make files contiguous.
>Having contiguous files is less important with scatter-loading, although
>it'd be nice if it could make contiguous each file's allocation on any
>given disk unit.
>
>There's also STRASPBAL, which has been around for a while.
>
>The absolute cleanest "defrag" is a save/wipe/restore of the system.
>Unlike the above, this method has risks and involves downtime.
>
>
>John A. Jones, CISSP
>Americas Information Security Officer
>Jones Lang LaSalle, Inc.
>V: +1-630-455-2787 F: +1-312-601-1782
>john.jones@xxxxxxxxxx
>
>-----Original Message-----
>From: midrange-l-bounces@xxxxxxxxxxxx
>[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Steve Moland
>Sent: Tuesday, March 14, 2006 8:25 AM
>To: midrange-l@xxxxxxxxxxxx
>Subject: Iseries Disk managment
>
>  I'm a fossil and have been around since 360/20 days. Other than using
>RGZPFM to re-organize some very volatile file on my career long boxes, I
>just realized that I've not thought about or worried about defragging
>the drives as a whole.
>
>I revitalized some of my grandkids laptops this last weekend by simply
>defragging them.
>
>The question of why we don't need to do that on the Iseries boxes popped
>into my head.
>
>Is that because the don't need to have it done, or we really do need to
>do that and is it like the early days when IBM just didn't give us the
>same tools and features that existed on other boxes. That's not
>necessarily a complaint because I think many may have stayed out of
>trouble by not having some more esoteric features available.
>
>There is also the issue that they write books about what I don't know
>about that which I work on. [grin]
>
>Steve Moland
>
>
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