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In PowerCenter, you create a source DEFINITION to include as a MAPPING source. You create a target definition to include as a mapping target. In the DEVELOPER tool, you create a physical DATA object that you can USE as a mapping source or target.

In PowerCenter, you create a source definition to include as a mapping source. You create a target definition to include as a mapping target. In the Developer tool, you create a physical data object that you can use as a mapping source or target.

You can validate a mapplet as a rule. A rule is business logic that defines conditions applied to source data when you run a profile.

You can validate a mapplet as a rule when the mapplet meets the following requirements:

1. It contains an Input and OUTPUT transformation. 
2. The mapplet does not CONTAIN ACTIVE TRANSFORMATIONS. 
3. It does not SPECIFY cardinality between input groups.

You can validate a mapplet as a rule. A rule is business logic that defines conditions applied to source data when you run a profile.

You can validate a mapplet as a rule when the mapplet meets the following requirements:

1. MAPPLET in PowerCenter and in the Developer TOOL is a reusable object that contains a set of transformations. You can reuse the transformation logic in MULTIPLE mappings. 
2. PowerCenter mapplet can contain source definitions or Input transformations as the mapplet input. It must contain Output transformations as the mapplet output. 
3. Developer tool mapplet can contain DATA objects or Input transformations as the mapplet input. It can contain data objects or Output transformations as the mapplet output. 

A mapping in the Developer tool also includes the FOLLOWING features:

1. You can validate a mapplet as a rule. 
2. You use a rule in a profile. 
3. A mapplet can contain other mapplets. 

A mapping in the Developer tool also includes the following features:

The PowerCenter application services and PowerCenter application clients use the PowerCenter Repository SERVICE. The PowerCenter repository has folder-based security.

The other application services, such as the Data INTEGRATION Service, ANALYST Service, Developer tool, and Analyst tool, use the MODEL Repository Service. The Model Repository Service has project-based security.

You can migrate some Model repository OBJECTS to the PowerCenter repository.

The PowerCenter application services and PowerCenter application clients use the PowerCenter Repository Service. The PowerCenter repository has folder-based security.

The other application services, such as the Data Integration Service, Analyst Service, Developer tool, and Analyst tool, use the Model Repository Service. The Model Repository Service has project-based security.

You can migrate some Model repository objects to the PowerCenter repository.

The Power Center Integration Service is an APPLICATION service that runs sessions and workflows.

The Data Integration Service is an application service that performs data integration tasks for the Analyst tool,the DEVELOPER tool, and external clients. The Analyst tool and the Developer tool send data integration task requests to the Data Integration Service to preview or run data PROFILES, SQL data services, and MAPPINGS. COMMANDS from the command line or an external client send data integration task requests to the Data Integration Service to run SQL data services or web services.

The Power Center Integration Service is an application service that runs sessions and workflows.

The Data Integration Service is an application service that performs data integration tasks for the Analyst tool,the Developer tool, and external clients. The Analyst tool and the Developer tool send data integration task requests to the Data Integration Service to preview or run data profiles, SQL data services, and mappings. Commands from the command line or an external client send data integration task requests to the Data Integration Service to run SQL data services or web services.

• The unconnected LOOKUP is ENTITLED to receive input values from the result of LKP
• With unconnected lookup, it can only return one column VALUE
• The unconnected lookup does not really support user-defined default values

1. The CONNECTED lookup is a lookup which participates in all the data flows and it is CAPABLE of receiving inputs DIRECTLY from the pipeline itself.
2. Within connected lookup can be used within both DYNAMIC cache and static cache.
3. Within connected lookup, it CACHES all lookup columns
4. The connected lookup will support user-defined values

A parameter file is nothing but a file which is created in a text editor or a WORD pad.

The FOLLOWING different values can be defined in a parameter file, they are:

1. MAPPING parameters
2. Mapping variables
3. SESSION parameters

A parameter file is nothing but a file which is created in a text editor or a word pad.

The following different values can be defined in a parameter file, they are:

SLOW changing dimensions are those where the dimensions are meant to be changed in over TIME. The slow changing dimensions are noted as SCD.

They are three DIFFERENT types of slowly changing dimensions, they are:

1. Slowly changing dimension-Type 1: In this type of SCD it has only current records
2. Slowly changing dimension-Type 2: In this type of SCD it has both current records and also historical records
3. Slowly changing dimension-Type 3: In this type of SCD it has current records plus ONE previous record

Slow changing dimensions are those where the dimensions are meant to be changed in over time. The slow changing dimensions are noted as SCD.

They are three different types of slowly changing dimensions, they are:

They are THREE TYPES of dimensions that are available:

1. Junk dimension
2. Degenerative dimension
3. CONFORMED dimension

They are three types of dimensions that are available:

Yes, you can JOIN two flat files TOGETHER using JOINER transformation.

Joiner transformation is an active and connected transformation where it is primarily used to join two sources of DATA. The SOURCE of data can be from one origin or it can be from two different origins

Yes, you can join two flat files together using joiner transformation.

Joiner transformation is an active and connected transformation where it is primarily used to join two sources of data. The source of data can be from one origin or it can be from two different origins

Target LOAD order is nothing but a list of all activities where ONE can define the priority. Based on this priority the DATA will be loaded into the Informatica server.

If you have a list of source qualifiers CONNECTED to multiple targets then you can define the order or dictate an order to the Informatica server so that the data can be loaded into the targets.

Target load order is nothing but a list of all activities where one can define the priority. Based on this priority the data will be loaded into the Informatica server.

If you have a list of source qualifiers connected to multiple targets then you can define the order or dictate an order to the Informatica server so that the data can be loaded into the targets.

Active transformation:

It is a process it changes the NUMBER of rows that have GONE through the mapping. This process is called as Active transformation

Some of the Active transformations are:

• Sorter transformations
• Filter transformations
• Joiner transformations
• Rank transformations
• Router transformations

etc.

Passive transformation:

It is a process where it doesn’t CHANGE the number of rows that have gone through the mapping. This process is called as Passive transformation.

Some of the Passive transformations are:

• Expression transformation
• SEQUENCE Generator transformation
• Lookup transformation
• External procedure transformation
• Output transformation
• Input transformation

Etc.

Active transformation:

It is a process it changes the number of rows that have gone through the mapping. This process is called as Active transformation

Some of the Active transformations are:

etc.

Passive transformation:

It is a process where it doesn’t change the number of rows that have gone through the mapping. This process is called as Passive transformation.

Some of the Passive transformations are:

Etc.

The term transformation itself depicts the nature of the ACTIVITY. It is a repository object where it GENERATES, modifies and passes the data.

The following are different TYPES of TRANSFORMATIONS that are available in Informatica:

1. Aggregator transformation
2. Expression transformation
3. Filter transformation
4. Joiner transformation
5. Lookup transformation
6. Normalizer transformation
7. Rank transformation
8. Router transformation

The term transformation itself depicts the nature of the activity. It is a repository object where it generates, modifies and passes the data.

The following are different types of transformations that are available in Informatica:

The aggregator is nothing but a function which stores all the data in the aggregator cache until and unless it deals with all the aggregate CALCULATIONS.

So when you are executing a session in which you are using an aggregator transformation, the INFORMATICA server will AUTOMATICALLY start CREATING indexes and data caches in the memory to accommodate and process the transformation.

It is a known fact that Informatica server NEEDS more space, it stores the overflow values in all the cache files.

The aggregator is nothing but a function which stores all the data in the aggregator cache until and unless it deals with all the aggregate calculations.

So when you are executing a session in which you are using an aggregator transformation, the Informatica server will automatically start creating indexes and data caches in the memory to accommodate and process the transformation.

It is a known fact that Informatica server needs more space, it stores the overflow values in all the cache files.

In Informatica, they are TWO TYPES of LOADING:

1. Normal loading
2. Bulk loading

Normal loading is a PROCESS where the records are loaded one by one and it writes a log for the same. When compared to other types of loading normal loading the loading process takes time to the target source.

Bulk loading is a process where a set of records are loaded into the target database at once. When compared to normal loading process, bulk loading process takes very less time to load the DATA.

In Informatica, they are two types of loading:

Normal loading is a process where the records are loaded one by one and it writes a log for the same. When compared to other types of loading normal loading the loading process takes time to the target source.

Bulk loading is a process where a set of records are loaded into the target database at once. When compared to normal loading process, bulk loading process takes very less time to load the data.

• A mapplet is nothing but a RECYCLABLE object which uses a mapplet DESIGNER.
• Mapplet PERMITS to reuse the TRANSFORMATION logic in different mappings.
• A mapplet consists of a set of transformations.

• The reusable transformation concept is WIDELY USED in MAPPINGS.
• Reusable transformation is different to that of other mappings where they USE transformations as it stores as a metadata.
• Whenever there is a change in the reusable transformation, the transformation will be nullified in the mappings.

• Within Informatica, the DATA is processed based on row by row.
• Within the target table, every row is inserted and it is marked as a DEFAULT one.
• The use of update strategy is done only when there is a need to update a single row or INSERT a row based on a sequence DEFINED.
• Within the update strategy, we need to mention the condition so that the specified row in the update strategy can be processed and the row can be actually marked as PER the condition, i.e. updated or inserted.

• A surrogate key is nothing but a replacement of the primary key within the database.
• It is CONSIDERED to be a unique IDENTIFICATION factor for each row within a table.
• It is very helpful because the primary key can change and thus makes it DIFFICULT process to update the data, but not with the surrogate key.
• A surrogate key is always in the form of a digit or an integer.

If you have to do the session partition then you need to start configuring the session to partition to SOURCE data and then you have to install Informatica server MACHINE in different CPu. I.e. MULTIFOLD CPU’s.

If you have to do the session partition then you need to start configuring the session to partition to source data and then you have to install Informatica server machine in different CPu. I.e. multifold CPU’s.

A session task is defined as a BUNCH of INSTRUCTIONS which are GUIDED towards a power center server which ultimately DEFINES when to transfer the DATA from source to the targets.

A session task is defined as a bunch of instructions which are guided towards a power center server which ultimately defines when to transfer the data from source to the targets.

The standalone command task can be used anywhere WITHIN a WORKFLOW PROCESS to execute the SHELL COMMANDS.

The standalone command task can be used anywhere within a workflow process to execute the shell commands.

As the name itself SUGGESTS that the event is predefined. It is nothing but a file WATCH event. Within this process, it will wait for a CERTAIN file to ARRIVE at a specific location.

As the name itself suggests that the event is predefined. It is nothing but a file watch event. Within this process, it will wait for a certain file to arrive at a specific location.

A user-defined EVENT is nothing but a FLOW of tasks in the workflow process. These events can be created and RAISED as on when there is a need ASSOCIATED with it.

A user-defined event is nothing but a flow of tasks in the workflow process. These events can be created and raised as on when there is a need associated with it.

Workflow can be DEFINED as a SET of INSTRUCTIONS which are intended to communicate to the SERVER and letting it know on how to implement the TASKS.

Workflow can be defined as a set of instructions which are intended to communicate to the server and letting it know on how to implement the tasks.

The different TOOLS AVAILABLE in workflow MANAGER are:

1. TASK DESIGNER
2. Task developer
3. Workflow designer

The different tools available in workflow manager are:

CONTROL M is an ALTERNATIVE TOOL for scheduling processes other than workflow manager PMCMD.

Control M is an alternative tool for scheduling processes other than workflow manager pmcmd.

OLAP STANDS for ONLINE ANALYTICAL Processing. It is DEFINED as a method in which multidimensional ANALYSIS occurs.

OLAP stands for Online Analytical Processing. It is defined as a method in which multidimensional analysis occurs.

A group of workflow tasks accumulated in a set is nothing but CLASSIFIED as a “WORKLET”.

Within the workflow tasks, the following are included:

1. TIMER
2. Decision
3. Command
4. Event wait
5. Mail
6. Session
7. LINK
8. Assignment
9. Control

A group of workflow tasks accumulated in a set is nothing but classified as a “worklet”.

Within the workflow tasks, the following are included:

Dynamic cache:

It decreases the PERFORMANCE and productivity when compared to STATIC cache

Static Cache:

Static cache is a process where it just inserts the data all the time. It doesn’t matter how MANY times the data is COMING through, all it CARES about is just inserting the data.

Dynamic cache:

It decreases the performance and productivity when compared to static cache

Static Cache:

Static cache is a process where it just inserts the data all the time. It doesn’t matter how many times the data is coming through, all it cares about is just inserting the data.

The main USE of STORED PROCEDURE transformation is because it is a vital TOOL for maintaining and POPULATING databases within the environment.

The main use of stored procedure transformation is because it is a vital tool for maintaining and populating databases within the environment.

The FOLLOWING components are installed while installing Informatica power CENTER:

1. PowerCenter clients
2. Integration services
3. Repository service
4. PowerCenter DOMAIN
5. Administration console for PowerCenter

The following components are installed while installing Informatica power center: