Sharpen your Data Science Skills with Apache Spark
This 7-min Spark Tutorial is specially designed for those who want to become the next data scientist. It contains a hands-on overview of Spark, its features and components for Data Science.
I personally recommend, that when you add Spark skill in the resume, there are 60% more chances that you will get selected in the interview as compared to others.
Data Science has transformed the world. It has contributed towards the massive growth of data and the potential to harness that data to develop intelligent systems. The various tools of Data Science enable data scientists to analyze large amounts of data.
In this article, we will see how Spark has revolutionized the Data Science industry and various components of Spark. In the end, we will take a brief look at a use case that involves the use of Data Science with Apache Spark.
Introduction to Data Science
Data Science is one of the many technical buzzwords that have taken the world by storm. This is contributed by the massive increase in data and the many technological innovations that have contributed towards this growth.
Furthermore, Data Science has become a premier technology for mining insights from the dataset and assisting industries in solving their business problems. You can learn everything about Data Science by the FREE Data Science Tutorials Library.
After the introduction of data science, let’s take a brief intro to Apache Spark.
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What is Apache Spark?
When Apache released its open-source Big Data framework called Hadoop in 2011, Big Data became a buzzword and a reigning technology. The framework makes use of MapReduce that was developed by Google.
The MapReduce framework in Hadoop suffered from certain shortcomings and in order to overcome them, Apache released Spark which was an advanced framework.
Learn everything about Apache Spark in detail.
Spark is an open-source, that is capable of processing data efficiently with lighting speed which comes loaded with several development APIs. The data streaming capability gives Spark an edge over other predecessor Big Data platforms.
You can also carry out machine learning operations and SQL workloads that allow you to access the datasets.
Spark also allows you to integrate with big data platforms like Hadoop Clusters. With this, it is able to address the drawbacks of MapReduce through stream processing and facilitation of iterative queries.
Hadoop is used by Spark but only for the storage of massive data in its cluster management system. This is an in-memory computation platform that makes use of the management system. Spark is developed on application levels through multiple languages like Python, Java, R, and Scala.
Components of Apache Spark for Data Science
Now, we will have a look at some of the important components of Spark for Data Science. These are 6 main components – Spark Core, Spark SQL, Spark Streaming, Spark MLlib, Spark R and Spark GraphX.
This is the foundation block of Spark. It contains an API that houses the Resilient Distributed Datasets or RDD. Spark Core is capable of carrying out memory management, storage system integration and fault recovery.
You must check how to create RDD in Apache Spark
With the help of Spark SQL, you can perform querying and processing of structured data. You can also avail it for unstructured data. Through this, you can access HIVE, JSON, table using SparkSQL.
For many industrial applications, Spark Streaming is an important feature that makes it an ideal big data platform. Using this, you can perform easy manipulation of data that is stored in the disks. Spark makes use of micro-batching that allows real-time streaming of data.
Machine Learning is the quintessential part of Data Science. For performing machine learning operations, Spark contains a sub-project called MLlib. With this, the programmer can perform various operations like regression, classification and clustering. We will discuss MLlib in more details ahead.
For performing Graph Execution, we make use of the GraphX library. It is a Spark library that facilitates the use of computing graphs and their manipulation. The various algorithms that are used to make graphs are clustering, classification, searching, and pathfinding.
With SparkR, data scientists can analyze large datasets using the R shell. It makes use of the combination of the usability of R with its scalability.
This is the right time to start learning Apache Spark with industry veterans
Features of Spark for Data Science
Lighting Fast Processing
With the help of Apache Spark, you can avail lightning-fast and efficient processing of big data. Spark is capable of processing the data 100 times more than MapReduce. This allows a significant decrease in the read-write operations that are appended to the disk.
Spark is Dynamic
Using Spark, one can develop parallel application. This is facilitated by the 80 high-level operators of the Spark platform.
Through Spark RDD, Spark facilitates full-scale fault-tolerance. With the help of this, Spark ensures its capability to handle the failure of any working node in the Spark Platform. With this, there is a certainty of minimal data loss in the system.
With the help of Spark, there is an improvement over the older platforms like Hadoop. That is, Spark allows the data to be processed in real-time in the form of data streams as opposed to batch files.
Support for Multiple Languages
Through several programmable APIs in Java, R, Python, Spark provides a wide array of dynamic functionalities. This allows it to not only be programmed in Java but in many languages.
Easy Integration with Hadoop
There are several essential features in Spark that allow it to be connected to Hadoop Clusters. This allows Spark to be an efficient option for upgrading infrastructure that might otherwise cost fortune to the industries.
Data Science with Spark
One of the most important areas where Apache Spark is being used in Data Science is in the field of Text Analytics. Apache Spark is very well apt at handling unstructured information.
This unstructured data is mostly collected through conversations, phone calls, tweets, posts etc. In order to make sense of this information, Spark provides a scalable distributed computing platform.
Some of the various techniques that are supported by Spark for text analytics –
This technique involves the clustering of textual data. (i.e. Text clustering, data-driven topics)
It involves tagging of the unstructured data into different categories and sub-categories, hierarchies and taxonomies.
This involves the extraction of patterns such as phrases, addresses, phone numbers etc.
In Sentiment Analysis, we tag positive, negative or neutral text with different magnitudes of sentiments.
Practice Data Science Sentiment Analysis Project for Free
This technique involves semantics, casualty understanding, time and purpose.
Another important avenue of Data Science that is supported by Spark is Distributed Machine Learning. Spark provides support for machine learning operations through the MLlib subproject. Some of the algorithms that are available within the MLlib project are –
- Classification – Logistic Regression, linear SVM, least squares, classification trees.
- Regression – Generalized Linear Models, Regression Tree
- Collaborative Filtering – Alternating Least Squares, non-negative matrix factorization.
- Clustering – k-means clustering
- Decomposition – SVD, PCA
- Optimization Techniques – Stochastic Gradient Descent
With Spark 1.1, you can train linear models in a streaming manner as Spark supports MLlib + Streaming capability. Furthermore, Spark also supports MLlib + SQL as well as MLlib + GraphX library.
In this article, we understood the importance of Spark in Data Science. We first went through Spark and then discussed its various extensions in the field of Data Science through subprojects like MLlib, GraphX and also its capability to perform text analytics.
It also provides several features like Streaming and added SQL services to increase the functionality of its machine learning library. In this way, we conclude that Spark is an ideal platform for Data Science operations.
So, now you know the importance of Spark for Data Scientists. What are you waiting for? Start learning Spark with industry experts and become a master of this technology.