RE: TSM on Linux hosted on i5 outperforms TSM running on i5/os PASE.

So you don't have to vary off the tape drive and move it between OS/400
and Linux partitions like you do when moving it between OS/400
partitions?

Cool, I didn't expect that.

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 rob@xxxxxxxxx
Sent: Monday, June 12, 2006 5:16 PM
To: Midrange Systems Technical Discussion
Subject: RE: TSM on Linux hosted on i5 outperforms TSM 
running on i5/os PASE.

TSM is so vital that we used the SPENDMONEY command to get 
it's own 3582, 
card, etc.  So the ability to share a tape drive that even 
with a kick 
butt 3582 takes a day to run doesn't appeal to us.  If we 
did, we could 
probably figure out a way to share it also.  I noticed on our 
Linux lpar 
that any tape drive we configure in the i5/os lpar that hosts 
it shows up 
in Linux.  Heck if I create a virtual optical drive it shows up.

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





"Wilt, Charles" <CWilt@xxxxxxxxxxxx> 
Sent by: midrange-l-bounces@xxxxxxxxxxxx
06/12/2006 12:55 PM
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Subject
RE: TSM on Linux hosted on i5 outperforms TSM running on i5/os PASE.






Not really.

PASE isn't an interpreter because there isn't anything to interpret.
Remember, the i and p series run on the same hardware.

From the "Fortress Rochester" book:

"PASE uses the processor's ability to switch between AS/400 
and RS/6000
mode to execute an application in the PASE runtime. <...> 
Performance is
equivalent to a comparable pSeries or RS/6000 system running the same
application."

The issue appears to be differences in the device drivers required for
sharing in an OS-400/PASE environment versus a standalone AIX/Linux
environment.

Perhaps Rob could comment, but I imagine that with TSM in 
PASE, as long
as TSM wasn't using the tape drive OS/400 could use it with nothing
special to do.  Whereas with TSM in a Linux partition, the tape drive
would have to be moved from the Linux partition to the OS/400 before
OS/400 could use it.

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 Chris Bipes
Sent: Monday, June 12, 2006 10:35 AM
To: Midrange Systems Technical Discussion
Subject: RE: TSM on Linux hosted on i5 outperforms TSM 
running on i5/os PASE.

Is PASE not a giant interpreter?  Kinda like comparing basic 
interpreter
to compiled basic.  Everything should run faster using native code
compared to interpreted code.


Christopher Bipes
Information Services Director
CrossCheck, Inc.

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