RE: LTO5 dynamic speed matching, Saves and DUPS

8 Gigabit PCI Express Dual Port Fibre Channel Adapter (FC 5735; CCIN 577D)
Brocade 300 8Gb Fabric Switches with 8 gb SFPs, configured with 4 zones, each LPAR can see all 4 drives.
We are 100% SDD, at 69% capacity.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Evan Harris
Sent: Tuesday, July 23, 2013 3:17 PM
To: Midrange Systems Technical Discussion
Subject: Re: LTO5 dynamic speed matching, Saves and DUPS

Hi Paul

First thing I'd look at is are the tape drives attached to the interface card.

Otherwise a couple of things I'd wonder about are:
- DUPTAP/DUPMED from tape will be pretty much entirely streamed i.e. only one read will happen at a time
- Tape alone is probably slower then DIsk/SSD (pasrticularly the SSDs)

What percentage used are the SSD"s




On Wed, Jul 24, 2013 at 5:52 AM, Steinmetz, Paul <PSteinmetz@xxxxxxxxxx>wrote:

Anyone running Power7, SSD disk drives, LTO5 FH or HH, and either BRMS
AutoDup, DUPMEDBRM, or DUPTAP.
Also some knowledge on dynamic speed matching, data rates.
Is there any way of knowing what speed the tape drive is running at.
DUP, on the average, is taking 1 hour more than the save, starting to
cause issues.

Save rate averages 750 gb/hr. (1.9 gb save in 2 ½ hours) DUP rate
averages 600 gb/hr (1.9 gb DUP in 3 1/3 hours)


-----Original Message-----
From: Steinmetz, Paul
Sent: Monday, July 22, 2013 4:08 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Single user input inhibitted on all seesions to same LPAR
for
5 to 10 minutes

Good thought.

Also, forgot to mention that the user was not directly connected to
the LPAR B, but was passed through, STRPASTHR.

I did find what might be a common denominator, not sure if related.
At 12 noon, from a scheduled job, LPAR A does several (50 to 100)
SAVRSTOBJ from LPAR A to LPAR B.
These normally take a few seconds per object, longer if any locks.
Today, the first object took 5 minutes, then was successful.
I'm thinking some issue that connects the LPARS, maybe QSNADS, or
something else.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Bryan Dietz
Sent: Monday, July 22, 2013 3:33 PM
To: Midrange Systems Technical Discussion
Subject: Re: Single user input inhibitted on all seesions to same LPAR
for
5 to 10 minutes

look for network problems. bad switch port, nic card on the PC,
cable(s) etc.





Bryan

Steinmetz, Paul said the following on Mon, 7/22/2013 3:24 PM:

I had a single user (my manager / programmer) go input inhibited for
5

to 10 minutes, on all sessions.

LPAR was fine, I and others working fine.
Nothing in her joblogs, PAL, SAL, LIC log Using MPG, I checked for
locks, seizes, etc, I couldn't find anything.

Suggestions on where else to look or reasons for input inhibited culprit.

Thank You
_____
Paul Steinmetz
IBM i Systems Administrator

Pencor Services, Inc.
471 Delaware Ave
Palmerton Pa 18071

610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home

psteinmetz@xxxxxxxxxx
http://www.pencor.com/

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