Oracle Data Integrator(ODI) Concepts ..!!!

Qs> What is Oracle Data Integrator (ODI)?
Oracle acquired Sunopsis in 2006 and with it “Sunopsis Data Integrator”.

Oracle Data Integrator (ODI) is an E-LT (Extract, Load and Transform) tool used for high-speed data movement between disparate systems.

The latest version, Oracle Data Integrator Enterprise Edition (ODI-EE) brings together “Oracle Data Integrator” and “Oracle Warehouse Builder” as separate components of a single product with a single licence.

Qs> What is E-LT?

E-LT is an innovative approach to extracting, loading and Transforming data. Typically ETL application vendors have relied on costly heavyweight , mid-tier server to perform the transformations required when moving large volumes of data around the enterprise.

ODI delivers unique next-generation, Extract Load and Transform (E-LT) technology that improves performance and reduces data integration costs, even across heterogeneous systems by pushing the processing required down to the typically large and powerful database servers already in place within the enterprise.

Qs> What components make up Oracle Data Integrator?

“Oracle Data Integrator” comprises of:

- Oracle Data Integrator + Topology Manager + Designer + Operator + Agent
- Oracle Data Quality for Data Integrator
- Oracle Data Profiling

Qs> What is Oracle Data Integration Suite?
Oracle data integration suite is a set of data management applications for building, deploying, and managing enterprise data integration solutions:

Oracle Data Integrator Enterprise Edition

Oracle Data Relationship Management

Oracle Service Bus (limited use)

Oracle BPEL (limited use)

Oracle WebLogic Server (limited use)

Additional product options are:

Oracle Goldengate

Oracle Data Quality for Oracle Data Integrator (Trillium-based DQ)

Oracle Data Profiling (Trillium based Data Profiling)

ODSI (the former Aqualogic Data Services Platform)

Qs> What systems can ODI extract and load data into?
ODI brings true heterogeneous connectivity out-of-the-box, it can connect natively to Oracle, Sybase, MS SQL Server, MySQL, LDAP, DB2, PostgreSQL, Netezza.

It can also connect to any data source supporting JDBC, its possible even to use the Oracle BI Server as a data source using the jdbc driver that ships with BI Publisher

Qs> What are Knowledge Modules?

Knowledge Modules form the basis of ‘plug-ins’ that allow ODI to generate the relevant execution code , across technologies , to perform tasks in one of six areas, the six types of knowledge module consist of:

Reverse-engineering knowledge modules are used for reading the table and other object metadata from source databases

Journalizing knowledge modules record the new and changed data within either a single table or view or a consistent set of tables or views

Loading knowledge modules are used for efficient extraction of data from source databases for loading into a staging area (database-specific bulk unload utilities can be used where available)

Check knowledge modules are used for detecting errors in source data

Integration knowledge modules are used for efficiently transforming data from staging area to the target tables, generating the optimized native SQL for the given database

Service knowledge modules provide the ability to expose data as Web services

ODI ships with many knowledge modules out of the box, these are also extendable, they can modified within the ODI Designer module.

Qs> How do ‘Contexts’ work in ODI?

ODI offers a unique design approach through use of Contexts and Logical schemas. Imagine a development team, within the ODI Topology manager a senior developer can define the system architecture, connections, databases, data servers (tables etc) and so forth.

These objects are linked through contexts to ‘logical’ architecture objects that are then used by other developers to simply create interfaces using these logical objects, at run-time, on specification of a context within which to execute the interfaces, ODI will use the correct physical connections, databases + tables (source + target) linked the logical objects being used in those interfaces as defined within the environment Topology.

Qs> Does my ODI infrastructure require an Oracle database?
No, the ODI modular repositories (Master + and one of multiple Work repositories) can be installed on any database engine that supports ANSI ISO 89 syntax such as Oracle, Microsoft SQL Server, Sybase AS Enterprise, IBM DB2 UDB, IBM DB2/40.

Qs> Does ODI support web services?
Yes, ODI is ‘SOA’ enabled and its web services can be used in 3 ways:

The Oracle Data Integrator Public Web Service, that lets you execute a scenario (a published package) from a web service call

Data Services, which provide a web service over an ODI data store (i.e. a table, view or other data source registered in ODI)

The ODIInvokeWebService tool that you can add to a package to request a response from a web service

Qs> Is ODI Used by Oracle in their products?
Yes there are many Oracle products that utilise ODI, but here are just a few:

Oracle Application Integration Architecture (AIA)

Oracle Agile products

Oracle Hyperion Financial Management

Oracle Hyperion Planning

Oracle Fusion Governance, Risk & Compliance

Oracle Business Activity Monitoring

Oracle BI Applications also uses ODI as its core ETL tool in place of Informatica , but only for one release of OBIA and when using a certain source system.

ELT Vs ETL

•The ability to dynamically manage a staging area

•The ability to generate code on source and target systems alike, in the same transformation

•The ability to generate native SQL for any database on the market—most ETL tools will generate code for their own engines, and then translate that code for the databases—hence limiting their generation capacities to their ability to convert proprietary concepts

•The ability to generate DML and DDL, and to orchestrate sequences of operations on the heterogeneous systems

1.Explain what is ODI?why is it different from the other ETL tools.

ANS: ODI stands for Oracle Data Integrator. It is different from another ETL tool in a way that it uses E-LT approach as opposed to ETL approach. This approach eliminates the need of the exclusive Transformation Server between the Source and Target Data server. The power of the target data server can be used to transform the data. i.e. The target data server acts as staging area in addition to its role of target databasel. While loading the data in the target database (from staging area) the transformation logic is implemented. Also, the use of appropriate CKM (Check Knowldege Module) can be made while doing this to implement data quality requirement.

2.Explain about what you have done using ODI?

3.How will you bring in the different source data into ODI?

ANS:you will have to create dataservers in the topology manager for the different sources that you want.

4.How will you bulk load data?

ANS:In Odi there are IKM that are designed for bulk loading of data.

5.How will you install ODI?

ANS: http://subbus.blogspot.in/2014/03/oracle-data-integrator-odisunopsis.html 

6.How will you bring in files from remote locations?

ANS:We will invoke the Service knowledge module in ODI,this will help us to accesses data thought a web service.

7.How will you handle dataquality in ODI?

ANS:There are two ways of handling dataquality in Odi....the first method deals with handling the incorrect data using the CKM...the second method uses Oracle data quality tool(this is for advanced quality options)

8. what is load plans and types of load plans?
ANS) Load plan is a process to run or execute multiple scenarios as a Sequential or parallel or conditional based execution of your scenarios. And same we can call three types of load plans , Sequential, parallel and Condition based load plans. 
9. what is profile in odi?
ANS)  profile is a set of objective wise privileges. we can assign this profiles to the users. Users will get the privileges from profile. Please refer http://oditraining.blogspot.co.uk/2012/06/odi-security-manager-all-profiles.html


10 what is the odi console?
ANS) ODI console is a web based navigator to access the Designer, Operator and Topology components through browser. 

11.how to write the sub queries in odi?
ANS:)Using Yellow interface and sub queries option we can create sub queries in odi.
or Using  VIEW we can go for sub queries Or Using ODI Procedure we can call direct DB queries
in ODI.

12.suppose i having 6 interfaces and running the interface 3 rd one failed how to run remaining interfaces?
ANS: ) if you are running Sequential load it will stop the other interfaces. so goto operator and right click on filed interface and click on restart. If you are running all the interfaces are parallel only one interface will fail and other interfaces will finish. 

13. how to remove the duplicate in odi?
ANS) Use DISTINCT in IKM level. it will remove the duplicate rows while loading into target. 

14. suppose having unique and duplicate but i want to load unique record one table and duplicates one table?
ANS) Create two interfaces or once procedure and use two queries one for Unique values and one for duplicate values. 

15. how to write the procedures in odi?
ANS) Procedure is a step by step any technology code operations . you can refer