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How to Read a CSV File from Amazon S3 Using Python (With Headers and Rows Displayed)

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  Introduction If you’re working with cloud data, especially on AWS, chances are you’ll encounter data stored in CSV files inside an Amazon S3 bucket . Whether you're building a data pipeline or a quick analysis tool, reading data directly from S3 in Python is a fast, reliable, and scalable way to get started. In this blog post, we’ll walk through: Setting up access to S3 Reading a CSV file using Python and Boto3 Displaying headers and rows Tips to handle larger datasets Let’s jump in! What You’ll Need An AWS account An S3 bucket with a CSV file uploaded AWS credentials (access key and secret key) Python 3.x installed boto3 and pandas libraries installed (you can install them via pip) pip install boto3 pandas Step-by-Step: Read CSV from S3 Let’s say your S3 bucket is named my-data-bucket , and your CSV file is sample-data/employees.csv . ✅ Step 1: Import Required Libraries import boto3 import pandas as pd from io import StringIO boto3 is...
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How to Retain data in Kafka and Get Additional Time for Analysis

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The default topic retention period in Kafka is seven days. However, you can change the current retention period and keep data for a few more days. Hence it provides you additional time for analysis to get business insights.


How to Retain data in Kafka and Get Additional Time for Analysis


Kafka retention period

  • The retention period, you can set on two parameters of bytes and time. Due to cheap storage costs, companies wish to extend the data retention period. 
  • The retention period setup you need in the broker. It is not a deviation that Kafka is designed only for Seven days, and why we need to change it. Since space is cheaper, we can extend the retention period.

Setup for the retention period

Below is the setup in the broker configuration file for the retention period.

log.retention.bytes


  • The most significant size threshold in bytes for deleting a log.


log.retention.ms

  • The length in milliseconds of a log will be maintained before being deleted.


log.retention.minutes

  • Length before deletion in minutes. log.retention.ms is used as well if both are set.


log.retention.hours

  • Length before deletion in hours. log.retention.ms and log.retention.minutes would be used before this value if both are set.

Steps to disable retention period

You can disable the retention period by setting both log.retention.bytes and log.retention.ms to –1. So that we can effectively turn off the data deletion.

Steps to store data outside the broker

If we want our data to stick around for a while, what is the option other than brokers?
  • Move the data outside of Kafka and not retain it internally to the Kafka brokers themselves. 
  • Before data is removed by retention from Kafka, we could store the data in a database, in a Hadoop Distributed File System (HDFS™), or upload our event messages into something like cloud storage.

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