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06347 - Re(2): Advise on Upgrades
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Re(2): Advise on Upgrades
Hi Yannis,you are exactly right!
BECAUSE it is the standard! It (GB Ethernet) is the standard because it eats
less CPU than 100MB Ethernet.
But 35% is quite good for yourm APPL-server as average. You won't get better
performance with a third appl-server and then perhaps reducing the load to
25% on the APPL-server.
iSeries scales really good up to 80% CPU usage. SO, here is really no
bottleneck on your site.
Regards
Volker
-----Original Message-----
From: ÓìáñéáííÜêçò ÃéÜííçò [mailto:smarianakisZm...]
Sent: Dienstag, 4. Juni 2002 11:52
To: Gueldenpfennig, Volker; DoNotReply@consolut.eu
Subject: Re(2): Advise on Upgrades
Thank's for your reply.
We also feel the same way but we like to here other opinions also!
Why do you consider Gigabit Cards so important factor since from our
Performance Monitors we have an average utilazion of 35 % per Ethernet Card
?
I'm asking this because I saw that Gigabit (or older Opticonnect) is the
standards for SAP 3 Tier Implementations.
Thank's again,
Yannis
Gueldenpfennig, Volker [4/6/2002 10:43 ðì]:
Hi,
I would clearly say, that the 830-4way is the much better approach then the
830-2way with one more application server.
As soon as you switch to GigaBit Ethernet, you will see, that the
application servers are no longer used too much.
When you are having a 830-4way you even could run part of your batch jobs in
2-tier on the DB-server. This would give the opportunity to have them run a
lot faster.
On the other hand you could even try just to by an 820-2way with GB
Ethernet. In my eyes, this should be sufficient for your 120 users with the
current 2 2-way appl-servers.
Regards
Volker
-----Original Message-----
From: ÓìáñéáííÜêçò ÃéÜííçò [mailto:smarianakisZm...]
Sent: Dienstag, 4. Juni 2002 08:40
To: DoNotReply@consolut.eu
Subject: Advise on Upgrades
Hi Fellows Saplinks,
We need some advice on our Upgrades on AS/400's
The current situation is the following :
We have a 3 - Tier Environment with :
DataBase Server : 720 2-way (2063 feature) with 810 CPW (120 Interactive) ,
3
GB Memory and 120 GB Disk Storage(RAID-5) for SAP running on ASP 2
2 Application Servers : 270 2-way (2253 feature) with 2000 CPW (0
Interactive)
2 GB Memory and 35 GB Disk Storage (4 6718 Disks Mirrored).
Applications and DB server are communicating through 100 Mb dedicated
Ethernet
Cards.
We are running under V4R5 OS SAP ver 4.6C and kernel EBSDIC 4.6D with all
the
latest patches applied.
We have about 120 users (concurrrent)
The problem is the following :
We are thinking of upgrading our system (or systems) because IBM will not
support 720 series anymore and mainly because we are experiencing
performance
problems.
(Avg Responce Time in Dialog steps is between 1300 and 1600 ms with Avg Db
req.
time of 650 ms and Avg Resp Time of 14000 ms for background )
We have some very demanding (custom) background jobs that can not be
scheduled
to run at specific times (due to business reasons) and consume a lot of
resourses mainly at the Application Servres.( these jobs mainly transfer all
the POS sales into SAP system from various locations).
Given the fact that the jobs do not change and are tunned as much as
possible
we need some advice in what upgrade path you think will result in a much
faster
system
We have some possible scenarios :
In all scenarios we'll upgrade to V5R1 OS
1. Upgrade the Database server in 830 4way (4200 CPW)
Use the Database server as an application server as well as database server
and
keeping the Application servers as the are know (actually they will be at
2350
CPW each, after the upgrade to V5R1) and use Gigabit Ethernet Cards
2. Upgrade the Databse server to 820 2way (2350 CPW) and adding an extra
Application server model 270 2-way (similar to the ones that already have)
and
use Gigabit Cards.
We also considering of moving to ASCII version of SAP and going to Unix or
W200 for Application servers, keeping the Database AS/400. This step though
can
not be done for at least 7 months from know as our developers informed us,
mainly because of developing issues.
Given the above situation which of the above solutions will result in a
faster
SAP system (pureley for hardware point of view keeping all tha other factors
the same) ?
And also what kind of improvement can we expect ?
Any advise will be appreciated
Thank's in advance,
*************************************
Yannis Smarianakis
SAP Basis & System Administrator
Minoan Lines
tel : +30810399892
e-Mail: smarianakisZm...
*************************************
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