3-tier vs. 2-tier system architecture (DEV- QAS- PRD)

Dear Xperts,
I would like to know your opinion about a 3-tier (DEV->QAS->PRD) vs 2-tier (DEV/QAS->PRD) BW system architecture.
Why should you choose for 3 instead of 2, or the other way around. Thus pro's & cons.
Thx.
regards,
JvB
ps xcuse me 4 the cross-post in the 2004s part. It should be posted in this forum.

Hello
2 Tier architecture will have Presentation Layer and DataBase Layer. So each and every time we have to access the Database directly and this may affect the DB Performance and if the number of concurrent users are more then it will be worser.
in 3 Tier case another layer "Application layer" has been incorporated as an intermediate between the above said 2 layers and this prevents the direct access to the DB. The performance is not highly affected. can Manage multiple concurrent users.
Heard about 4 tier came and installation process going in in Gulf. (not sure)
Sankar.

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In a 3 tier XI landscape (DEV, QAS, PRD) which of the following two scenarios is best?
1. In the SLD define each DEV Business System with a target of the corresponding QAS Business System and define each QAS Business System with a target of the corresponding PRD Business System.
DEV ---> QAS ---> PRD
This means that we export ID objects from DEV and then import them into QAS. The objects then need to be exported from QAS for import into PRD
2. In the SLD define the DEV Business Systems with 2 target systems relating to corresponding QAS and PRD Business Systems.
DEV --> QAS
DEV --> PRD
This means that the same export from DEV can be used for import to both QAS and PRD.
Currently we have scenario 1 implemented but I am thinking of changing this to scenario 2 which I believe is a better solution as only one export is required and it is guaranteed that the same objects are being imported into QAS and PRD.
Any thoughts or comments?

Hi Mark,
I dont think thats a good thing to go with. When you are exporting, how are you going to control in CMS as to which environment you are going to export?
CMS itslef works on the principle of Develop->QA->PRD. This way, when you are in QA and found some bugs and fix them, you can export them all to QA. Finally you assemble them at QA and finally import them to PRD. This way, all the chaged objects later on would also get imported to PRD automatically.
Also As per my knowledge, in SLD, one target bus sys can have mulitple sources but the converse is not true.
VJ

10g Upgrade Order (DEV - QAS - PRD)

If I am upgrading Oracle 9.2.0.6 to 10.2.0.2, what issues will I face if I upgrade the landscape in the order of DEV, QAS, PRD.
I will wait a week between upgrades.
Will transports fail?
Will SAP face any issues having different Oracle versions?
Do I have to upgrade DEV, QAS, PRD at the same time?

-> transports will not fail as long as the sap release will not change...
-> normally all sap systems should run smoothly on supported database platforms...10g should be no problem...the three system reside on different hosts?
to be sure (sap states that different kernel releases within one system landscape can lead to problems) try to keep the time between QAS and PRD very short and avoid transporting...
-> no, you don't have to upgrade all systems at the same time...a week between DEV and QAS is enough
GreetZ, AH

Different Sales Organization in CRM DEV,QAS,PRD

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Please help! Rewards await.
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Hi Ravi Yadav,
Thank you for the reply!
I tried transporting the Org model but still when I tried creating a sales order using CRMD_ORDER, the system still unable to get the right base/list price and then when I check one of the condition tables (CNCCRMPRSAP004 & CNCCRMPRSAP005) it still contains the wrong sales org unit number series. Do I need to do the initial loading R3AS (R/3 to CRM)? to overwrite the entries of those condition tables?
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Logical system same in DEV/QAS/PRD for ALE

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We haven't used ALE but now need to set it up. Problem is, DEV and QAS are copies of PRD so all three have the same logical system name. I read about how using bdls to rename the logical system can create inconsistencies and am worried it can ruin our transport system.
Appreciate your comments, thanks & best regards.
Claudio

Using BDLSS in comaprsion to BDLS - logical systems can also be converted remotely in all partner system.
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544509 - ALE: Converting the name of the "logical system"
121163 - BDLS: Converting logical system names
1478123 - FAQ: Source system
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Risks when maintain only one SolMan system for DEV, QAS and PRD systems

What are the risks involved when maintaining only one solution manager system for entire client landscape(Small size).
Or No risks are involved?
Or Is this the SAP rrecommended approach for small size landscapes?
One SolMan system -> DEV and QAS and another SolMan system -> PRD.

>
Sanjai Prabu Govindan wrote:
> What are the risks involved when maintaining only one solution manager system for entire client landscape(Small size).
> Or No risks are involved?
Anand: Risks Involved depends on what all aspects\Scenarios the Solution Manager System is used for. It Could be used for the following purposes
1) Service Desk
2) Solution Monitoring
3) System Monitoring
4) Change Management
How do you propose to use the Solman system ?
>
> Or Is this the SAP rrecommended approach for small size landscapes?
> One SolMan system -> DEV and QAS and another SolMan system -> PRD.
Anand: This is the most idealistic and SAP recommended way of using Solman....it always better to have it this way no matter in how many scenarios you intend to use Solman for....
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Anand.....

Overhead Rates Maintenance in DEV,QAS & PRD Systems

Hello All,
I need your expert advice on this topic. "What is the best practice to maintain OH rates in SAP Systems across the landscape". Any link to document, whitepaper or knowledge link is very welcome.
I am aware that it can be maintained after making the system modifiable. But being a basis guy, i am against this method and am on the look out for the best process to do it.
Points will be awarded for sure for worthy answers.
Best Regards,
Sri

Hi,
To define the overhead method, choose:
Period-end closing->Single functions->Accrual calculation->Extras ® Settings->Percentage method, or
Planning->Planning aids->Accrual calculation->Extras->Settings->Percentage method
Using the overhead structure display for the given controlling area, you can maintain, create, or call up information on accrual calculations for selected objects.
To do so, choose one of the following objects either by double-clicking on it or by choosing Goto from the menu:
Base (basis for calculation): You specify the base cost elements that are to be assigned overhead per controlling area. Choose Where-used list->Overhead structure or Controlling area to display whether and where the base cost element assignments exist.
O/H rate (overhead rates): Determines plan and actual overhead rate percentages for each controlling area applying to a particular validity period. On the overhead list screen, the Assignments indicator shows whether individual overhead rates exist.
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Controlling->Cost Center Accounting-> Planning->Planning Aids->Accrual Calculation-> Percentage Method->Maintain Overhead Structure.
- Actual Postings->Period-End Closing->Accrual Calculation->Percentage Method-> Maintain Overhead Structure.
Save your entries.
Hope this helps you.
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Manish

DEV, QAS, PRD Systems be monitored in ONE SOLUTION (DSWP)

Hi solman lovers:)
If there any chance to monitor 3 systems: develop. quality assurance and productive in ONE solution?
If yes, please explain what should we do (what's the role of the solution should be and etc...)
Thanks.
Best regards,
Vladimir.

Hi Ivan:
Absolutely, you can.
Refer to the following blog:
/people/federico.babelis2/blog/2006/04/25/system-monitoring-configuration-guide-for-dummies
Regards,
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SAP Printing requirment on the fresh landscape (DEV,QAS,PRD)

Hi BASIS Guru,
I am new in BASIS(ECC 6.0), I want to configure printers for SAP pirnting. Opreating system we are using on my site is RHEL-5. I am not sure on how to start configuring multiple printer on SAP. Please provide me some information for the same.
I am already reading through help.sap.com, but it is too vast and it is confusing me.
Thanks in advance ,
Yogendra

Hi, Printing can be configured using the using the Tcode SPAD in basis for spool administration.There is mainly three types of configuring printing in SAP basically they are local , remote and frontend printing.Local printing is used when The operating system spooler runs on the same host as the R/3 spool work process.When using remote printing, an R/3 spool work process passes the print-ready output stream to the
operating system spooler on a different host.
Frontend printing allows R/3 users to send output to printers that are defined on their local frontend PCs (access method F). For local printing Windows NT API (access method C) and Unix based system access method L.For frontend PCs (access method F). If you are satisfied with my answer mark me.If your are not knowing the device driver of your printer you can use the swine device type.

SOLMAN 4.0 SR2 connect to SAP R/3 Three System landscape (DEV QA and PRD)

Hi,
We have successfully installed SOLMAN 4.0 SR2 (ABAP + JAVA) on
WIN2003 SP2 EE MSSQL 2005 EE SP1.
I just want to activate the service so that SOLMAN could see my existing SAP R/3 4.6 C Three system landscape (DEV QAS PRD).
I heard settings should be done on SPRO IMG configs. Could anyone tell me the exact procedure to navigate on it. I see a lot of buttons to config and execute, Just want to make sure everything will be in order.
My SLD is directly installed locally on my SOLMAN server.
Thanks,
Simoun

Hello Simoun,
Telling from your last sentence I assume that you would like to connect SolMan (transaction SMSY) to your locally installed SLD or in other words: replicate SLD system data into SOLMAN system landscape SMSY.
Please check this document:
http://service.sap.com/~form/sapnet?_SHORTKEY=01100035870000538663&_SCENARIO=01100035870000000202&_OBJECT=011000358700000530282007E
Here you find information covering prerequisites, required SAP Solution Manager IMG configuration to connect SLD and SMSY and frequently ask questions (FAQ-like).
I hope this helps you to get started.
Regards,
Doreen

Different Recipients of Alerts in DEV and PRD Systems.

Dear All
I wanted to know if it is possible to configure different set of recipients for an alert category in XI DEV and XI PRD systems.
For example i have two groups "Group A" and "Group B" which should recieve alert mails.For this ,
we can create 2 different roles in XI DEV i.e. "Role_A" and "Role_B" and assign user id's to these roles and then assign these roles to Alert Category using the "Recipients Via User Roles" option .This is done in XI DEV system.
My question is it possible that alert mails are just sent to "Role_B" in the XI PRD system. (not to ROLE_A). As ideally we would be transporting the alert categories from DEV> QAS> PRD can we have different recipients configurations in DEV and PRD.
Please suggest.
regards
Nilesh.

Hi Nilesh,
Yes it is possible, Just change the receipent of alert category on PRD system (you can change receipent anytime you want).
Regards,
Gourav
reward points if it helps you

Importing Program from Production System to DEV and QAS.

Hi All,
I have 3 Systems in my Landscape.
DEV-> QAS-> PRD
One of my Z program is running in the Production system.
This Z program is got deleted in the DEV and QAS.
How can I import the Program from Production System to QAS and DEV.
Regards,
Viji.

hi Vijaya laxmi,
you can goto Production system ---> SE38/ SA38 and copy the program and create the same in program using SE38 in Development system and then transport it to Quality system.
You can also Re-Import the Request from Production to Dev system.
Thanks,
Nelson
Edited by: Nelson karunakar on Sep 18, 2008 7:15 AM

Solution Manager DEV and PRD box

In my landscape i have 2 systems for solution manager SMD and SMP , what is the ideal way sap community is using them ...should i divide the solman roles among them or how the 2 system landscape of solman is used ..
Regards

Hello Tiger,
In my experience many SAP customers have a one or two system landscape in Solution Manager.
For customers whose main line of business is providing service with the Solution Manager, I would recommend a three system landscape (dev, qas and prd). For customers who run less critical functionality with Solution Manager, and when costs of hosts for the Solution Manager systems are an issue, one or two tier system landscapes can be also considered. Other than this, I don't know any document with precise guidelines to answer your question. At the end it all depends on the scenarios you want to run, and how critical the functionality you run with Solution Manager is for your company.
Best regards,
Miguel Ariñ

Difference between 3 Tier and N-Tier architecture in HFM

Hi Gurus
What is the Difference between 3 Tier and N-Tier architecture in HFM?
regards
Smilee

3 Tier is a client/server architecture with 3 fixed tiers: Presentation / User Interface Layer, Business Logic Layer, and Data Layer.
N-Tier architecture is also a client/server architecture; however, it may not have 3 tiers. 3 Tier IS a specific type of N-Tier architecture.

Has anyone implemented ChaRM in a 4-tier or 5-tier landscape?

Iu2019ve setup ChaRM with a 3-tier landscape DV1-QA1-PRD and everything works as advertised. I used the transport route, DV1/120 -c- /QA1/ (clients 149/150) -QA1 -d- PRD/150. Where -c- is a consolidation route and -d- is a delivery route.
Now I need to do a proof of concept to see if I can get CHaRM to work with our current landscape. We have a dual development path and need to make sure we sync our DEV and QA systems. The lanscape Iu2019m trying to use is DV1-QA1-PRD-DV2. The transport route Iu2019m trying is DV1/120 -c- /QA1/ (clients 149/150) -QA1 -c- PRD/150 -d- DV2/120. Iu2019ve tried various combinations and the only way I can get it to work is DV1/120 -c- /QA1/ (clients 149/150) -QA1 -d- PRD/150 -d- DV2/120. When I release and import into PRD it goes to both PRD and DV2. While this gets the transport to my support dev box I need to have another step in the workflow. What Iu2019m looking for is the workflow to act like dev-qa-qa-prd.
Has anyone setup a 4-tier or 5-tier landscape with release and import steps between each system? If so what did you use for your transport route and were they other config changes needed after the route?
Thanks for your time.
Jeff

Hi Jeff
Have a look at these
http://help.sap.com/saphelp_smehp1/helpdata/en/a3/0aae435a1342e8a56998d83a797161/content.htm
/people/dolores.correa/blog/2009/08/27/change-request-management-scenario-retrofit-functionality
Hope it helps
Santosh

3-tier vs. 2-tier system architecture (DEV- QAS- PRD)

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