Jerome Rajan

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Jerome Rajan
Staff Solutions Consultant at Google
Data & Analytics
  • Residence:
    India
  • City:
    Mumbai
SQL
Dataproc, EMR
Hadoop
BigQuery
AWS Glue
PySpark, Python
Data Pipeline Design
Tableau, Redshift, Snowflake
IBM DataStage
  • AWS Lambda, S3, EMR, SQS, DynamoDB, Step Functions, Cloud Functions
  • Unix Shell Scripting, Python
  • Oracle, DB2, Redis
  • Alteryx, VBA, Blueprism, UiPath
English
Tamil
Hindi
Malayalam
Marathi

My Blog

A BACKUP PLAN
January 6, 2022 / Knowledge
A BACKUP PLAN

I have a web server where I manage 4 websites that we developed over the past 5 years. While performing…

Presentation Pro Tip – 1
January 6, 2022 / Knowledge
Presentation Pro Tip – 1

“If you just saw the stats and numbers, you’d think that I love losing at chess!” Hence the reason why…

Spark Architecture – Notes & FAQ
July 29, 2021 / Technology
Spark Architecture – Notes & FAQ

I’ve spent the past couple of weeks trying to master the Spark Architecture and this post is a running summary of all my notes and questions gathered from across the internet & Stackoverflow. If you feel something is incorrect, I’ll be happy to discuss. Hope you find it useful!

Chess Analytics
January 6, 2021 / Technology
Chess Analytics

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Quiz Quotient

To View The App, Please switch to “Desktop Mode” on your mobile browser [advanced_iframe use_shortcode_attributes_only=”true” src=”https://jeromerajan.com/custom/qqjs.html” width=”1000″ height=”550″ ] Quiz…

What, Why, How – Continuous Loading To Snowflake Using Snowpipes (AWS)
December 21, 2020 / Technology
What, Why, How – Continuous Loading To Snowflake Using Snowpipes (AWS)

WHAT Loading into Snowflake can be done in multiple ways – Bulk loading from Snowflake stages (internal and external) Using…

What, How, Why : Storage Integration Object in Snowflake
December 18, 2020 / Technology
What, How, Why : Storage Integration Object in Snowflake

WHAT From a security POV, Storage Integration is a very useful feature provided by Snowflake. At it’s core, Storage Integration…

The All New AWS Glue Studio
October 7, 2020 / Technology
The All New AWS Glue Studio

Up until now, AWS provided a visual representation of your code but never really allowed you to build using a…

Real Time Data Streaming Into Kinesis & Ingestion Into Postgres Using AWS Glue – Part 2 (Configure Glue Catalog Tables)
October 6, 2020 / Technology
Real Time Data Streaming Into Kinesis & Ingestion Into Postgres Using AWS Glue – Part 2 (Configure Glue Catalog Tables)

Before we start building Glue jobs, we need to understand that one of the unique features of Glue is its…

Real Time Data Streaming Into Kinesis & Ingestion Into Postgres Using AWS Glue – Part 1 (Setup)
October 5, 2020 / Technology
Real Time Data Streaming Into Kinesis & Ingestion Into Postgres Using AWS Glue – Part 1 (Setup)

This April, Amazon announced support for serverless streaming ETL using AWS Glue. For the uninformed – AWS Glue is built…

AWS – Develop ETL jobs using AWS Glue Endpoints
October 3, 2020 / Technology
AWS – Develop ETL jobs using AWS Glue Endpoints

AWS Glue scripts can have start up times that could be as long as 12 minutes especially if you are…

January 5, 2020 / Experiences
Juggernaut Resolution

One of the things I have always struggled with, and I’m sure you’ll relate to this, is sticking to New…

February 25, 2018 / Technology
NGBR-00019 – Input Dataset 0 not present in design time information

NGBR-00019 : Input data set 0 not present in design time information. Extended field properties for this field will not…

February 25, 2018 / Technology
Replace Strings in DataStage

Trying to find a way to replace strings. e.g. In the string “chocolate”, I want to replace “choc” with “mock”….

February 25, 2018 / Technology
Generate Unique Counter in a Parallel Transformer Without Surrogate Key generator

Old but handy trick. @INROWNUM * @NUMPARTITIONS + @PARTITIONNUM Update – To start the series from 1, use (@INROWNUM –…

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