The overview of Informatica is explained in the previous article Informatica PowerCenter.

Informatica relies on an ETL concept which is abbreviated as Extract- Transform- Load.

What is ETL?

It is a data warehousing concept of data extraction where the data is extracted from numerous different databases.

Who Invented ETL?

Ab Intio- a multinational software company based out of Lexington, Massachusetts, United States framed a GUI Based parallel processing software called as ETL.  The other historic transformations relating to ETL journey are briefed here.

Where do Informatica-ETL concepts apply in Real-Time Business?

Informatica is a company that offers data integration products for ETL, data masking, data Quality, data replica, data virtualization, master data management, etc. Informatica ETL is the most commonly used Data integration tool used for connecting & fetching data from different data source. 

Some of the typical use cases for approaching this software are:

1. An organization migrating from an existing software system to a new database system. 
2. To set up a Data Warehouse in an organization where the data is moved from the Production/ data gathering system to Warehouse.
3. It serves as a data cleansing tool where data is detected, corrected or removed corrupt or inaccurate records from a database.

How do Informatica - ETL tool is implemented?

1. Extract: 

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The data is extracted from different sources of data. Common data-source formats include relational databases, XML and flat files, Information Management System (IMS) or other data structures. An instant data validation is performed to confirm whether the data pulled from the sources have the correct values in a given domain. 

2. Transform:

A set of rules or logical functions like cleaning of data are applied to the extracted data in order to prepare it for loading into a target data source. Cleaning of data implies passing only the "proper" data into the target source. There are many transformation types that can be applied to data as per the business need. Some of them can be column or row based, coded and calculated values, key-based, joining different data sources etc. 

3. Load: 

The data is simply loaded into the target data source. 

All the three phases are executed parallelly without being waiting for other to complete or begin. 

What are other features of ETL Tool?

Parallel Processing:

ETL is implemented using a concept called Parallel Processing. Parallel Processing is a computation executed on multiple processes executing simultaneously. ETL can work 3 types of parallelism - 

1. Data by splitting a single file into smaller data files.
2. The pipeline allows several components to run simultaneously on the same data.
3. A component is the executables. Processes involved for running simultaneously on different data to do the same job.

Data Reuse, Data Re-Run and Data Recovery:

Each data row is provided with a row_id and each piece of process is provided with a run_id so that one can track the data by these ids.  There are checkpoints created to state the certain phases of the process as completed. These checkpoints state us the need for us to re-run the query for completion of the task.

Frequently Asked Informatica Interview Questions

Visual ETL: 

The advanced ETL tools like PowerCenter and Metadata Messenger etc., that helps you to make faster, automated and highly impactful structured data as per your business needs

You can ready-made database and metadata modules with drag and drop mechanism on a solution which automatically configures, connect, extracts, transfers and loads on your target system. 

What are the characteristics of a Good ETL Tool?

1. It should increase data connectivity and scalability.
2. It should be capable of connective multiple relational databases. 
3. It should support even csv-datafiles so that end users can import these files with less code or no code.
4. It should have a user-friendly GUI that makes end users to easily integrate the data with the visual mapper.
5. It should allow end user to customize the data modules as per their business needs.

What is the Future of ETL?

Informatica -ETL products and services are provided to improve business operations, reduce big data management, provide high security to data, data recovery under unforeseen conditions and automate the process of developing and artistically design visual data. They are broadly divided into-

1. ETL with Big Data
2. ETL with Cloud
3. ETL with SAS
4. ETL with HADOOP
5. ETL with Meta data etc. 
6. ETL as Self-service Access
7. Mobile optimized solution etc., there are many more.

ETL is expanding its wings widely across the newer technology as per the present enterprise Faster world  to value,  staff, integrate,  trust,  innovate and to deploy. 

Why is Informatica ETL is in boom?

1. Accurate and automate deployments
2. Minimizing the risks involved in adopting new technologies
3. Highly secured and trackable data
4. Self- Owned and customizable access to the permission
5. Exclusive data disaster recovery,  data monitoring and data maintenance.
6. Attractive and artistic visual data delivery.
7.Centralized and cloud-based server. 
8. Concrete firmware protection to data and organization network protocols.

What are the side effects of Informatica ETL kind of automated data integration systems?

Anything in limit is good. But something like Data integration tool makes the organization to depend on it continuously. As it is a machine, it will work only when a programmed input is given. There is an equal risk of complete crashing of the systems- how good the data recovery systems are built. A small whole is enough for the rat to build its cage in our house. Similarly, any sort of misuse of simple data leads to a huge loss to the organization. Negligence and carelessness are enemies to these kinds of systems.

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List of Informatica Courses:

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