
Explore the key characteristics of big data, volume, variety, velocity, veracity, value, and variability, and see how real-time, structured and unstructured data yield actionable insights.
Explore how the Hadoop distributed file system (HDFS) stores very large files across commodity hardware and captures streaming data from IoT devices and social media.
Explore how HDFS write operates with the name node and data nodes, covering permissions, data queue, block size, replication across data nodes, and failure handling in a distributed file system.
Explore how HDFS stores large files by dividing them into data blocks with a default 128 MB block size, adjustable via dfsci block size in hdfs-site.xml.
The lecture explains how HDFS replicates blocks across data nodes, guided by the name node’s metadata on file names, number of replicas, and block IDs.
Explore how HDFS high availability uses active-passive NameNode, shared storage, and Zookeeper to keep metadata and data accessible, with failover through journal nodes.
Explore rack awareness in HDFS, boosting fault tolerance and performance by distributing three data replicas across racks, with policies preventing multiple copies on a single node and rack.
Explore how spark architecture enables in-memory data processing across a cluster, coordinating distributed tasks with a driver on master and worker nodes, using predicate pushdown and physical plans.
Spark enables in-memory computation for fast processing compared with disk-heavy Hadoop. It supports diverse file formats, connectors, multiple languages, batch and real-time streaming, and fault-tolerant RDD workflows.
Spark limitations include the small file issue with driver metadata and the need to bundle files for performance, plus higher RAM and CPU costs and slower JDBC API calls.
Explore the difference between spark session and spark context, and learn how spark session provides a unified entry point for dataframe and dataset APIs, plus sql and streaming.
Discover Spark unified solution that connects to Azure Blob, SQL databases, MongoDB, Amazon S3, and Kafka, enabling real-time streaming and batch processing in one platform.
Explore Spark RDDs, the resilient distributed data set and the legacy low-level API, noting how high-level APIs convert to RDDs, with lazy evaluation and lineage.
Explore data lineage by tracing how values travel from initial variables through successive transformations, across customer transactions and banking data, to generate reports via ETL.
Explore directed acyclic graphs, identifying vertices and edges, tracing directed paths from a to b, c, and d to e, and recognizing no cycles along with topological order.
Explore spark sql optimization by examining logical and physical plans, applying filter pushdown and projection pruning to minimize memory use, and selecting efficient join strategies through cost-based analysis.
Explore Spark 3.0's adaptive query framework, a re-optimization technique that revises logical and physical plans during multi-stage execution to optimize memory, speed, and resource use.
Course Title: Big Data and Apache Spark Essentials
Course Overview:
Dive deep into the world of Big Data with our intensive course designed to equip you with the fundamental knowledge and practical skills needed to harness the power of big data technologies. This course covers the core components of Big Data processing using Hadoop and Spark, offering insights into their architectures, functionalities, and optimization techniques. With a blend of theoretical knowledge and hands-on exercises, learners will emerge ready to tackle big data challenges in real-world scenarios.
Course Content:
Section 1: Understanding Hadoop and HDFS
Lecture 1: About Big Data: Introduction to big data, its characteristics, and why it matters.
Lecture 2: About Hadoop: Overview of Hadoop, its ecosystem, and components.
Lecture 3: HDFS Read: Understanding how HDFS supports read operations, including its process and efficiency.
Lecture 4: HDFS Write: Exploring the write functionality within HDFS and its importance for data storage.
Lecture 5: HDFS Data Block: Insights into how data is stored in blocks within HDFS and the benefits of this approach.
Lecture 6: HDFS Data Replication: Delving into the replication process within HDFS for data safety and availability.
Lecture 7: HDFS High Availability: Strategies for ensuring high availability in HDFS and mitigating the risk of data loss.
Lecture 8: HDFS Rack Awareness: Understanding rack awareness and its role in improving data reliability and access speed.
Section 2: Spark Architecture and Benefits
Lecture 9: Spark Architecture: Detailed exploration of Spark’s architecture and how it enables fast, in memory data processing.
Lecture 10: Spark Advantages: Discussing the key benefits of using Spark over other big data technologies.
Lecture 11: Spark Limitations: A realistic look at Spark’s limitations and how to navigate them.
Lecture 12: SparkSession & SparkContext: Introduction to SparkSession and SparkContext as the foundational elements of working with Spark.
Lecture 13: Spark Unified Solution: Overview of Spark as a unified solution for big data processing, including batch and stream processing.
Section 3: Spark RDDs, Lineage, and DAG
Lecture 14: Spark RDDs: Deep dive into Resilient Distributed Datasets (RDDs), the fundamental data structure of Spark.
Lecture 15: Lineage: Understanding the lineage.
Lecture 16: Spark DAG: Exploration of Directed Acyclic Graph (DAG) and its role in optimizing Spark jobs.
Section 4: Spark Optimization
Lecture 17: SQL Optimization: Techniques for optimizing SQL queries in Spark for improved performance.
Lecture 18: Adaptive Query Plan: Understanding adaptive query planning for optimizing Spark execution plans dynamically.
Target Audience:
This course is ideal for data professionals, software engineers, and IT professionals who wish to gain a solid understanding of big data technologies, especially Hadoop and Spark. Prior knowledge of programming and basic understanding of databases will be beneficial.
Learning Outcomes:
By the end of this course, participants will be able to:
Understand the key concepts and components of Hadoop and Spark.
Perform data processing tasks using HDFS.
Leverage Spark for efficient big data analysis and processing.
Optimize data queries and processes using Spark's advanced features.
Implement Spark solutions for real-world data challenges.
Enroll in this course to navigate the vast landscape of big data technologies and to acquire the skills necessary to become a proficient big data practitioner.
This course description is structured to provide a clear pathway through the complexities of big data technologies, emphasizing both theoretical background and practical skills acquisition.