One model, multiple databases?

Hi,
is it possible to have ADF entities from different databases in one Business Component Projects?
If so, where do I specify which connection should each entity use?
Ragards
Jernej

What is your architecture ? EO are not relevant so they are ignored
project_1
+am_p1_1
+vo_p1_1
project_2
+am_p2_1
+vo_p2_1
project_view
- depedency p1
- depedency p2
You may be able to build your ui from vo_p1_1 using vo_p2_1 as lov after the ui is generated by extending the corresponding item.
I think it is not possible, but i'm not sure, to declare vo_p2_1 as lov at the model level (in project_2).
If it is important or easier for you, you may just create a view in the project_1 corresponding database instance that use a dblink ot project_2 corresponding instance. You may use this view to as a lov directly at model level as it is table from your instance. All sql transactional aspects regarding distributed transactions are (nicely) managed by the database.

Similar Messages

One Application Multiple Databases

Hello Friends,
I am developing application using Struts and Hibernate. I is a web application. Now i want to do one functionality that is some what like..
Suppose "My_Appp" is my application. I have 1,2,3,4 clients or users. Now I want to maintain seperate database for an individual user. Suppose 1 login's he will be directed to his database and when 2 login's he will be directed to his own database but I want to deploy Only and Only one .war file for all the Users. Means One Interface and Multiple databases. Is this possible using Hibenate and Struts. I anybody know, Please help me?
Thanks and Regards
Dagadu Akambe
Pune, India

I wouldn't recommend this. Why wouldn't you try to put a 'user' table to the database and let user xy only work on his entities?
The other solution would be, using different aliases, but imo this has the same nasty effect.
The only way using more than one database is, imo, if different data is stored in different databases.
I'm sorry this post isn't answering your questions, but there is surely an easier solution.
reagards
slowfly

Determining wether to implement on a single database or multiple databases.

Good Day Mentors,
Our company will be migrating from 2004B to 8.81. We currently have 2 databases. We wanted to know what are the things to consider before choosing wether to go one or multiple database. We are in F&B. The 2 databases purchase and sell the same items for most of the inventory.
I've already checked these links:
[Merge multiple separate companies (databases) into one]
[Re: Multiple companies in one database vs. multiple databases]
[Re: Setting up two companies on one database]
After reading those posts, I've listed these questions(this I'll be asking the users/management):
1.) Are the 2 databases, 2 business/legal entities?
2.) Is the Tax files separately for each subsidiary/company?
3.) Are the reports(P/L, balance sheet, etc) usually consolidated?
4.) Is it ok that the people can see all the BP's, GL accounts, Pricelists etc?
Are there till things I need to ask the management in order to make a wise decision on the matter?
Are there still pros/cons I need to raise up?
Thanks in advance!
Sean Yu

Hello,
1.) Are the 2 databases, 2 business/legal entities?
It will 2 business /Legal entities when you have registered your company in two different tax registration no.(PAN)
2.) Is the Tax files separately for each subsidiary/company?
Totally depend on how you registered your company in tax department .means if you have saparate tax reg no then it might be.
3.) Are the reports(P/L, balance sheet, etc) usually consolidated?
this option in optional it may be or may not be .
4.) Is it ok that the people can see all the BP's, GL accounts, Pricelists etc?
No, because data will very huge then user become confuse at the time of data entry(but we have solution for same without SDK)
Means totally depend that both company register in same tax no or two different tax no.
Thanks
Manvendra Singh Niranjan

Multiple databases in one file: a small snafu

Hello everyone,
Opening multiple databases in a single file is an administrative convenience. It is well explained in the manual (see db/docs/ref/am/opensub.html). Normally, there is little difference between databases in their own physical files or grouped together in a single physical file. There is one small sentence in the manual that says the following:
(begin fragment)
However, since multiple databases in a file exist in a single physical file, opening two databases in the same file simultaneously requires locking be enabled unless all of the handles are read-only. As the locks for the two databases can only conflict during page allocation, this additional locking is unlikely to affect performance.
(end fragment).
I didn't pay attention to it, except the "unlikely to affect performance" part which told me that I wasn't to worry about it. The sun was shining. Life was good.
And I was wrong. It was one of those "epic bug quests" I had to embark on, only to realise that it may not be a BDB bug, but my carelessnes. Nevertheless, I'm left with an uneasy feeling which I would like to explain here.
Consider BDB configured as a concurrent data store.
There are 2 threads. The first thread has the following pseudocode:
cursor1 = db1->cursor(...)
while(cursor1->c_get(... DB_NEXT...))
// 1
cursor2 = db2->cursor(...)
while(cursor2->c_get(... DB_NEXT...))
The second thread does only the following:
db3->put(...)
db1, db2 and db3 are all distinct databases. All cursors are read-only (the cursor implicitly used in db3->put is of course a write cursor).
While the first thread is running, the second thread executes db3->put(...) at "//1".
Question: what happens?
Answer 1: if db1, db2 and db3 reside in different physical files, nothing special happens. Everything proceeds as it should.
Answer 2: if db1, db2 and db3 reside in the same physical file, both threads block "sometimes".
The "sometimes" used here means "when the put operation in thread 2 needs to allocate a new page".
Reading the BDB source code is extraordinarily difficult (which says more about my limitations than about the clarity of the code) but here is what happens, as far as I could determine:
(thread 1) cursor1 needs and acquires a read lock on db1
(thread 2) db3->put needs a write lock on db2 to allocate a new page. Since db2 is in the same physical file as db1 and thread 1 already has a read lock, thread 2 waits until the read lock is released. Thread 2 blocks.
(thread 1) cursor 2 needs a read lock on db3. For some reason, BDB detects that the another thread is waiting for a write lock on the physical file, and thread 1 blocks.
Both threads block waiting on each other to complete.
I suppose the system is the way it is to avoid starvation, but there you have it: be careful when you're lumping together multiple databases in one file!
Anyone who can clarify or confirm this is welcome.
Vincent

I had experienced a similar problem. I run multiple process. Each one of them starts a transaction that does db->put and db->pget to its own database (which also has a secondary index). When each database is in a separate physical file there is no problem but when I put all databases in a single file the processes start to dead-lock.
The following combination of options solved the deadlocking problem:
- use serializable isolation level instead of snapshot, i.e. do not pass DB_TXN_SNAPSHOT to txn_begin
- do not pass the DB_NO_WAIT option to txn_begin
- use Btree instead of a Hash
Hope that helps.

Multiple databases in one single RAC cluster

Hi, I would like to know if one can have multiple databases running on a single RAC cluster, we have several databases in our shop and would like to consolidate all of them into a single 3-4 node RAC cluster running databases with 10.2 and 11.1 versions.
I am newbie to RAC and would like to get some clarification if anyone has done this, google search comes up with few hits on this topic, so obviously this is not doable.
In our case we have one database supporting critical applications and few other not so critical but are used very extensively between 9-5, so what is the use of RAC if I cannot consolidate all my databases into one cluster, or if I need a separate cluster for each of these critical databases?
I have been all the Oracle docs that keep repeating one database multiple instances and one instance-one machine-one node, they don't even advise running multiple instances on a single node?.
I appreciate any insight.
Thanks.

ora-sql-dba wrote:
Can you give more details on how you would setup multiple databases running different versions on a single RAC cluster, I am yet to find any documentation that supports or even elaborates on this topic.You can configure a cluster with 12 nodes. Then, using dbca, configure a dev instance for nodes 1 and 2, a prod1 instance for nodes 3 to 6 and a prod2 instance for nodes 7 to 12.
You also can configure each of these instances for all 12 nodes. And use it on all 12 nodes.
Or, after configuring it for all 12 nodes, you can start the dev instance on nodes 1 and 2, prod1 on 3 - 6 and prod2 on the remaining nodes. If dev needs more power, you can for example shutdown prod2 on node 12 and start another dev instance there.
My issue is with the 2nd option - running more than one instance on the same node or server. Why? Each instance has a basic resource footprint ito shared memory needed, system processes required (like db writer, log writer, sys monitor) etc. It does not make sense to pay for that same footprint more than once on a server. Each time you do, you need to reduce the amount of resources that can be used by each instance.
So instead of using (for example) 60% of that server's memory as the SGA for a single instance, if you use 2 instances on that server you now have to reduce the SGA of each to 30% of system memory. Effectively crippling those instances by 50% - they will now have smaller buffer caches, require more physical I/O and be more limited in what they can do.
So unless you have very sound technical reasons for running more than one instance on a server (RAC or non-RAC), do not.

Multiple databases in one Environment

I am tryiing to figure out the best way to implement my JE environment. My use case requires that I be able to use UNIX tools like 'cp' to move JE databases from place of generation (development) to place of consumption (production). Moreover, each JE database stores very different data and has different refresh cycles (ex., one of them may be refreshed every week, another may be refreshed once a month, etc.)
My dilemma is:
1)- Should I use one env w/multiple databases, or,
2)- A separate env for each database?
With (1), I can't see a way of selectively updating one of the databases and copying over the changed JE log files to production servers (for read-only access at runtime). Every time I want to update one database, I'm thinking I'll have to pull down all JE log files, update the DB and push out all JE log files to production servers.
(2) seems to go against the guidelines I've seen in this forum, viz., one env per process is more efficient.
Thoughts/experiences/comments are welcome.
Thanks

Hi,
What Charles suggested is the best approach if you need to avoid the performance issues with having multiple environments in a single process (you mention that you've read about them elsewhere on the forum). Please also be aware that we're working to solve those problems in an upcoming release. So if you prefer, you can implement your application using multiple environments now, and expect that the performance issues will be resolved later. This might make sense if your deployment will be small at first, and performance will not be a big issue right away.
Mark

Multiple Databases in one Business Area?

Can I put multiple databases into the same Business Area?
The crux of the problem is as follows: I am migrating data from one database to another. There will be a period of dual running, whilst the products are migrated.
I want to be able to write reports that compare the data between the two databases, and show me the discrepancies.
Oh one of the databases is not Oracle, so using a db link is not an option.
null

Can I put multiple databases into the same Business Area?
The crux of the problem is as follows: I am migrating data from one database to another. There will be a period of dual running, whilst the products are migrated.
I want to be able to write reports that compare the data between the two databases, and show me the discrepancies.
Oh one of the databases is not Oracle, so using a db link is not an option.
null

Can we link one application instance with multiple databases ?

We have R12.1.1 and db is 11.1.0.7 on redhat 5.3 ( 64 bit).
Can we link one application instance ( apps / , inst / ) with multiple database ( db / ),
is this possible ?
if yes how ?

>
Can we link one application instance ( apps / , inst / ) with multiple database ( db / ),
is this possible ?
No. You cant link application tier with more than one database.
Similar query already answered by Hussein in detail in the forum :Re: Multiple instances, single Apps tier Please check that for more details
-Rk

Multiple companies in one database vs. multiple databases

Our company is going through an SAP B1 implementation. We develop\manage shopping centers, each their own lega entity, etc. To somewhat protect the financials, bank accounts, etc of each entity, we set each company up with its own database. We are currently up to 22 databases. Initially our consolidation plan relied on reports; however, the administration of the databases is more of a challenge than expected.
Does anyone have a feel for the pros\cons of consolidating these companies into one "segmented" database?
Thanks

If you have multiple legal entities / companies, I would rather recommend that you create multiple databases within the SAP Business One server. This will let you manage different users, layouts, Chart of Accounts (CoA), Business Partner codes and a host of other items that would be very difficult to do if you tried to lump them all into one company.
Of course, having to work at some form of consolidation reporting is no easy task, but I would suggest you try to standardise your CoA for all the other 22 companies as so they have the same headers / Account titles. This way, you can at least try a very basic report where you generate a TB from each company and pass it to Excel, and then work at some form of macro to draw / consol the 22 Trial Balance reports into one master copy.
If you have SDK access, you could try doing it via SDK or maybe look at other partners with consol add on's like http://www.citixsys.com/

Multiple database patching in one go (sharing same oracle_home) ?

hi,
good day.
did any one experience running "startup upgrade" for more 3 databases sharing same oracle_home?
i mean, did any one tried to apply database patchset 3/4 (command-set given below) to more than one databases (sharing one oracle_home) at the same time to minimize the downtime?
SQL> STARTUP UPGRADE
SQL> SPOOL patch.log
SQL> @?/rdbms/admin/catupgrd.sql
SQL> SPOOL OFF
or it can ONLY be done on one-by-one basis?
database: 10.2.0.2
plateform: hpux 11.31
An earliest response will be highly oblidged..
regards,
X.

Mr X wrote:
hi andrewmy,
you said, we can upgrade different databases simultanously in different telnet/ssh sessions after patching the oracle_home.
hi chinar,
i agree, we have to run catupgrd.sql script for every database. my question was that can we run multiple catupgrd.sql for multiple databases after patching oracle_home successfully?
After patch installing you have run catupgrd.sql for multiple database only once time.For more information refer upgrade guide and note of this patch.
so, finally, are you both agree that we can run multiple catupgrd.sql scripts for multiple databases concurrently?
right ?
Yes,you can execute these concurrently,but your server need more resource.
did any one tried it before, is that speedy as compared to one by one db-upgrade procedure?
The speed of upgrade depend your server resource CPU/RAM.

Can not create more than one model on one table

My table and tablespace, and semnetwork have been created successfully, with following SQL:
CREATE TABLESPACE MYONTOLOGY_TBS
DATAFILE 'C:\Oracle\oradata\odb1\myontology_tbs.dat' SIZE 1024M REUSE
AUTOEXTEND ON NEXT 256M MAXSIZE UNLIMITED
SEGMENT SPACE MANAGEMENT AUTO;
EXECUTE SEM_APIS.CREATE_SEM_NETWORK('MYONTOLOGY_TBS');
CREATE TABLE MYASSERTIONS
ID NUMBER NOT NULL,
ASSERTION MDSYS.SDO_RDF_TRIPLE_S NOT NULL
TABLESPACE "MYONTOLOGY_TBS";
Then, I tried to create two models on that table, as following:
EXECUTE sem_apis.create_sem_model('amodel', 'MYASSERTIONS', 'ASSERTION');
EXECUTE sem_apis.create_sem_model('bmodel', 'MYASSERTIONS', 'ASSERTION');
The result was:
anonymous block completed
anonymous block completed
Error starting at line 2 in command:
EXECUTE sem_apis.create_sem_model('bmodel', 'MYASSERTIONS', 'ASSERTION');
Error report:
ORA-13199: Internal error in SDO_RDF.CREATE_RDF_MODEL: SQLERRM=ORA-55300: model bmodel does not exist dss=
SELECT count("ASSERTION") FROM "MYASSERTIONS"
ORA-06512: at "MDSYS.MD", line 1723
ORA-06512: at "MDSYS.MDERR", line 17
ORA-06512: at "MDSYS.SDO_RDF", line 937
ORA-06512: at "MDSYS.SDO_RDF", line 972
ORA-06512: at "MDSYS.RDF_APIS", line 726
ORA-06512: at line 1
13199. 00000 - "%s"
*Cause: This is an internal error.
*Action: Contact Oracle Support Services.
It seems that more than one model can not coexist on one single table, is that right? And is it means that, if I wanna manage a large number of models, I must create and manage the same large number of table? On my case, I have hundreds of models to handle and thousands of predicates in each on average, I don't think managing hundreds of tables is a good approach, is there another way?

Oracle may think manage metadata of their database is a simple and interesting task, but I don't think so. I believe that manage database metadata should only be oracle's duty, I would never involve even one single line of DDL in my software. So if I can not store multiple model in a single table, or at least a certain number of tables, I have to discard oracle's solution, and build one of myself.

Update Model from database does not update Nullable Property -- Possible bug?

Hi,
I don't know if this is the correct forum.
When updating Model from database seems does not update the entity nullable property.
and it will not update the Default Value from the Backend (MSSQL) also.
I am using VS2008 SP1 3.5EF, XP64Bit Machine.
Thanks
vb.net GUI

maybe related..
today.. i changed the PK size.. from char(10) to char(36)
got many problems.. easy to fix...
but some query stop working:
Table1Record.Table2Reference.Load(); //i'm trying to load table2 from table1..
throw this error: A relationship multiplicity constraint violation occurred: An EntityReference expected at least one related object, but the query returned no related objects from the data store.
i get this error only when PK is greater than char(10)...
with SQL profiler.. i saw that PK was truncated to char(10) :
exec sp_executesql N'SELECT [... some fields...]
FROM [dbo].[Table1] AS [Extent1]
INNER JOIN [dbo].[Table2] AS [Extent2] ON [Extent1].[NoTable2] = [Extent2].[NoTable2]
WHERE [Extent1].[NoTable1] = @EntityKeyValue1',N'@EntityKeyValue1 char(10)',@EntityKeyValue1='a2164b14-e'
(NoTable1 is the PK changed from char(10) to char(36))
i'm working with VS.NET 2008
so, i looked at Model1.Edmx... in notepad
CSDL was not changed when i did the "Update Model from Database" !!!
here is SSDL part:
        <EntityType Name="Table1">
          <Key>
            <PropertyRef Name="NoTable1" />
          </Key>
          <Property Name="NoTable1" Type="char" Nullable="false" MaxLength="36" />
here is CSDL part:
        <EntityType Name="Table1">
          <Key>
            <PropertyRef Name="NoTable1" />
          </Key>
          <Property Name="NoTable1" Type="String" Nullable="false" MaxLength="10" Unicode="false" FixedLength="true" />
Cool.. i found the prob.... but why ? and how to correct this ? manually change Model1.Edmx in notepad ??
why the maxlength property is readonly in Model Browser pane ??
what about VS.NET 2010 ?! same prob ??
is it a bug or by design ?
I hope this can help someone.. I spent a few hours on this prob
Patrick

Multiple database members in a single Grid Row

Hi All,
I have created an FR report (9.3x) and getting the below error while trying to run the report via Web Preview.
5217: Error Processing Results;hasPovDims=1;povXML=<?xml version="1.0"?><datasources><datasource name="FIN QA" dsid="-117fcde3_132fd17f2f6_-771b" allowEdit="1"><dim name="Versions" dimIndex="0" dsName="FIN QA" keyDimName="Versions" memberName="Versions" displayName="Versions: Versions"/><dim name="Scenarios" dimIndex="4" dsName="FIN QA" keyDimName="Scenarios" memberName="Scenarios" displayName="Scenarios: Scenarios"/><dim name="Components" dimIndex="5" dsName="FIN QA" keyDimName="Components" memberName="Components" displayName="Components: Components"/><dim name="Customers" dimIndex="6" dsName="FIN QA" keyDimName="Customers" memberName="Customers" displayName="Customers: Customers"/><dim name="Assets" dimIndex="7" dsName="FIN QA" keyDimName="Assets" memberName="Assets" displayName="Assets: Assets"/></datasource><datasource name="FINDEF QA" dsid="-607fb334_128b79d246e_-7d0a" allowEdit="1"><dim name="Time Periods" dimIndex="1" dsName="FINDEF QA" keyDimName="Time Periods" memberName="Time Periods" displayName="Time Periods: Time Periods"/><dim name="Scenario" dimIndex="3" dsName="FINDEF QA" keyDimName="Scenario" memberName="SC_Actual" displayName="Scenario: SC_Actual"/><dim name="Versions" dimIndex="4" dsName="FINDEF QA" keyDimName="Versions" memberName="VR_Input_Version" displayName="Versions: VR_Input_Version"/><dim name="Customers_Region" dimIndex="6" dsName="FINDEF QA" keyDimName="Customers_Region" memberName="CU_NA" displayName="Customers_Region: CU_NA"/><dim name="Assets" dimIndex="7" dsName="FINDEF QA" keyDimName="Assets" memberName="Assets_NA" displayName="Assets: Assets_NA"/></datasource></datasources>
In my report I have selected 2 rows where I have selected @descendants of ccounts from one database which is FIN QA and in the second row I have selected @children of Accounts from another database which is FINDEF QA. I am using only ONE GRID here.
Is it not possibe to run a FR report by select members from multiple databases in a single grid??
Please have your valuable inputs.

Yes it possible to retrive data from multiple database using single grid.
Also there are few limitations namely:
Database connections must be of the same type (for example, both must be Essbase database connections or both must be Financial Management database connections).
Mismatched number of dimensions in the database connections may cause retrieval errors.
For more details refer to this link for details:-
http://www.oracle.com/technetwork/middleware/financial-management/tutorials/obe-multipledbs-086586.html
Cheers
Vikas Naidu

Need to select one from multiple values from a parameter memory area

Hello,
I am accessing transaction CKM3N, and, by using the old/classical debugger, it's possible to see that the parameter ID BDTJ (2nd box of the Period/Year parameter line) contains not one but 2 values (in the old/classical debugger version, go to GOTO->System Areas-> Sap Memory):
BDTJ ( 4)G <2009>
L <2008>
I want to access the value from the line that contains 'L', not 2009, from the one that holds 'G'.
How do I differentiate between them, how do I access one specific value when a single parameter ID has more than one value assigned to it ?
Thanks in advance,
Avraham

Ah, youre actually asking different things.
In your topic title, you say youre running separate instances
In your body text, you say you are under different user/schema
So tell me, do you have more than one database or not? How many entries in your TNS file?
I would say, for "multiple database instances"
SELECT
a.id, b.id
FROM
tableA a
INNER JOIN
tableB@OTHER_DATABASE_LINK_NAME b <--NOTE!
USING(id)And of course you will have to look up CREATE PUBLIC DATABASE LINK sql..
Message was edited by:
charred

Use 1 listener for multiple database in a server

hi guys,
just want to check whether this is the right way to configure my Listener.ORA . I am using 1 listener.ora to listen for incoming request connection from remote client. There are multiple databases installed in a server.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ora03)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = O11R2)
(ORACLE_HOME = /oracle/app/oracle/product/11.2.0/db_1)
(SID_NAME = O11R2)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = O10G)
(ORACLE_HOME = /oracle/app/oracle/product/10.2.0/db_1)
(SID_NAME = O10G)
)sorry i am reading about it so did not install another database to test out. Just thinking in the line that it mention that the list of SID is refering to the multiple database that is installed in a server and i am using 1 listener.
Please further advice.

Shivananda Rao wrote:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ora03)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = O11R2)
(ORACLE_HOME = /oracle/app/oracle/product/11.2.0/db_1)
(SID_NAME = O11R2)
(SID_DESC =
(GLOBAL_DBNAME = O10G)
(ORACLE_HOME = /oracle/app/oracle/product/10.2.0/db_1)
(SID_NAME = O10G)
)Please use as above. You can have one listener for multiple databases.right right so it the pattern goes like this:
SID_LIST_LISTENER =
     (SID_LIST =
          (SID_DESC =
          (GLOBAL_DBNAME = AAAA)
          (ORACLE_HOME = /oracle/app/oracle/product/11.2.0/db_1)
          (SID_NAME = AAAA)
          (SID_DESC =
          (GLOBAL_DBNAME = BBBB)
          (ORACLE_HOME = /oracle/app/oracle/product/10.2.0/db_1)
          (SID_NAME = BBBB)
     )thanks !

One model, multiple databases?

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