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Why Do We Need Informatica
Tutorials?
Informatica, in the recent times with its huge range of advantages has acquired a
huge popularity and fame amongst the users.
The software programs that informatica offers are highly helpful. Besides, it offers
a great amount of support in accomplishing the task. The informatica software
consists of various data warehousing components along with the integration tools.
The combination or the blend of the two in an effective manner is what
informatica software is all about.
The informatica software with the involvement of several components and
software techniques often results out to be a little confusing for the user.

The Informatica tutorials offer a detailed knowledge about the software program.
Informatica software offers a great amount of help to the users
Informatica software offers a great amount of help to the users
Be it a student or a business, it is helpful to all and many. For technology lovers,
Informatica software is no less than a boon.
The software is believed to be the reason behind the increased productivity of the
various business organizations.
Informatica is an ETL tool which supports features like extraction, transformation and
load process.

The blend of data warehousing with the integration tools has promoted
informatica to be used as the integration tool as well.
The software lets you manage the data of the organization in an
effective manner. It even helps in reducing budgets of your organization
and helps in increasing the productivity by gradually increasing the
demands of your information technology business.

Informatica Session properties
There are three major properties, defined in Informatica Workflow Manager for each
session, which impact Informatica mappings performance.
1. Commit Interval: The target-based commit interval determines the commit points at
which the Integration Service commits data writes in the target database.
2. DTM Buffer Size: The DTM Buffer Size specifies the amount of memory the Integration
Service uses for DTM buffer memory.
3. Additional Concurrent Pipelines for Lookup Cache Creation: Additional Concurrent
Pipelines for Lookup Cache Creation parameter defines the concurrency for lookup cache
creation.
4. Default Buffer Block Size: The buffer block size specifies the amount of buffer memory
used to move a block of data from the source to the target.

Useful Questions
Explain informatica repository?
The Informatica repository is a relational database
that stores information, or metadata, used by the
Informatica Server and Client tools. Metadata can
include information such as mappings describing how
to transform source data, sessions indicating when
you want the Informatica Server to perform the
transformations, and connect strings for sources and
targets.
What is power center repository?
The Power center repository allows you to share
metadata across repositories to create a data mart
domain.

What are the types of Informaica client tools?
Designer
Server Manager
Repository Manager
What are the types of designer tools?
The Designer provides the following tools are :Source Analyzer
Warehouse Designer
Transformation Developer
Mapplet Designer
Mapping Designer
What is difference between maplet and reusable transformation?
Maplet consists of set of transformations that is reusable.
A reusable transformation is a single transformation that can be reusable.

What is Aggregator Transformation?
Aggregator transformation is an Active and Connected transformation.
The Aggregator transformation allows you to perform aggregate
calculations, such as averages and sums.
The Aggregator transformation is unlike the Expression transformation,
in that you can use the Aggregator transformation to perform
calculations on groups.
What is filter transformation?
Filter transformation is an Active and Connected transformation.
The Filter transformation provides the means for filtering rows in a
mapping. You pass all the rows from a source transformation through
the Filter transformation, and then enter a filter condition for the
transformation.

What is Joiner transformation?
Joiner Transformation is an Active and Connected
transformation. This can be used to join two sources coming
from two different locations or from same location. The
Joiner transformation to join two sources with at least one
matching port.
What is clustering?
Clustering is the process of grouping the data into classes or
clusters so that objects with in a cluster have high similarity in
comparison to one another, but are very dissimilar to objects
in other clusters.

What are the types of cache?
Static cache
Dynamic cache
Persistent cache
Recache from lookup
Shared cache
What are the transformation having cache concept?
Data Cache - 2GB
Index Cache - 1GB
How does the recovery mode work in informatica?
In case of load failure an entry is made in OPB_SERV_ENTRY(?) table
from where the extent of loading can be determined.

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