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Here’s All You Need to Know about Apache Spark 2.4

Posted on January 28, 2019January 28, 2019 by Dexlab

Here’s All You Need to Know about Apache Spark 2.4

Apache Spark 2.4 has joined the data bandwagon recently – and it is incredible. It brings experimental support for Scala 2.12. Join us as we dig into the features of the latest Spark version – what else it has to offer to our big data developers – apart from a brand new barrier execution mode supporting Databricks Runtime5.0!

Of late, as we were all busy tapping IoT revolution and latest discoveries in the domain of AI, Apache Spark rolled out a new array of exciting goodies in terms tech features to enhance the data experience for data scientists and developers. The power package is Apache Spark 2.4 – it boasts of a dozen improved features and upgrades that tackle large-scale data processing in a jiffy. Known to all, Apache Spark is a powerful analytics engine that is designed to deal with humongous volumes of data with speed and efficiency. Under the Apache Software umbrella, Spark is one of the most successful projects and the most active open source big data programs.

The latest Spark version is a combination of its erstwhile goals, such as ease of use, efficiency and speed, along with stability and refinement. On a positive note, Project Hydrogen is finally panning out as expected. Designed to ensure better coordination between big data and AI, deep learning frameworks work well. The barrier mode bolsters up better integration with distributed deep learning architecture. The present architecture of Spark is a bit intricate because elaborate communication patterns result in frequent snags and blockages.

However, thanks to the latest barrier execution mode, Spark can seamlessly initiate training tasks like MPI tasks and promptly restart everything when task failures occur. Also, this Spark has introduced a new process of fault tolerance for barrier tasks – whenever barrier task breaks down, Spark mindfully aborts all tasks and initiates the stage.

In addition, Spark 2.4 also comes with built-in advanced functions such as map and array. The latest high-in-order functions permit developers to tackle challenging types directly. Also, these much-improved functions have the ability to manipulate highly advanced values with an anonymous lambda function.

The new Spark offers experimental support for Scala 2.12- owing to this, the developers can now write entire Spark applications with Scala 2.12 just focusing on the 2.12 reliability. It is also equipped with improved interoperability with Java 8 resulting in better serialization of lambda functions.

This latest Spark variant also features built-in support for Apache Avro, the widely recognized data serialization format. As a result, today, the developers can write and read their Avro data within Spark itself. It first started off as a Databricks Project and today it boasts of a host of new functions and superb logical support.

Moreover, Apache Spark 2.4 highlights refined Kubernetes integration in 3 particular ways, and they are as follows:

Aids running containerized PySpark and SparkR on Kubernetes,
Client Mode is on offer,
A higher number of mounting options is made available for increasing Kubernetes volumes.

Besides, other improvements to be noted are:

Pandas UDF upgrades,
Prompt ascertainment of DataFrames in notebooks,
Elimination of 2GB-block size limitation.

Additionally, the new release supports Databricks Runtime 5.0.

Want to know more? Check out our Apache Spark training courses in Delhi. They are well curated and student-friendly. DexLab Analytics is not only touted for its best Scala training Delhi but also our Spark training courses are highly advanced and industry-relevant.

The blog has been sourced from ― jaxenter.com/apache-spark-2-4-overview-151623.html

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Top 3 Reasons to Learn Scala Programming Language RN

Posted on January 15, 2019May 23, 2020 by Dexlab

Top 3 Reasons to Learn Scala Programming Language RN

Highly scalable general-purpose programming language, Scala is a wonder tool for newbie developers as well as seasoned professionals. It provides both object-oriented and functional programming assistance. The key to such wide level popularity of Scala lies in the sudden explosive growth of Apache Spark, which is actually written in Scala – thus making later a powerful programming language best suited for machine learning, data processing and streaming analytics.

Below, we have enumerated top three reasons why you should learn Scala and tame the tides of success:

For Better Coding

The best part is that you would be able to leverage varied functional programming techniques that will stabilize your applications and mitigate challenges that might arise due to unforeseen side effects. Just by shifting from mutable data structures to immutable ones, and from traditional methods to purely functional strategies that have zero effect on their environment, you can stay rest assured that your codes would be more stable, safer and easy to comprehend.

Inarguably, your code would be simple and expressive. If you are already working on languages, such as JavaScript, Python or Ruby, you already know about the power of a simple, short and expressive syntax. Hence, use Scala to shed unnecessary punctuations, explicit types and boilerplate code.

What’s more, your code would support multiple inheritance and myriad capabilities, and would be strongly-typed. Also, in case of any incompatibilities, it would be soon caught even before the code runs. So, developers in both dynamic and statically typed languages should embrace Scala programming language – it ensures safety with performance along with staying as expressive as possible.

To Become a Better Engineer

He who can write short but expressive codes as well as ensure a type-safe and robust-performance application is the man for us! This breed of engineers and developers are considered immensely valuable, they impress us to the core. We suggest take up advanced Scala classes in Delhi NCR and take full advantage of its high-grade functional abilities. Not just learn how to deliver expressive codes but also be productive for your organization and yourself than ever before.

Mastering a new programming language or upgrading skills is always appreciable. And, when it comes to learning a new language, we can’t stop recommending Scala – it will not only shape your viewpoint regarding concepts, like data mutability, higher-order functions and their potential side effects, but also will brush your coding and designing skills.

It Enhances Your Code Proficiency

It’s true, Scala specialization improves your coding abilities by helping you read better, debug better and run codes pretty faster. All this even makes you write codes in no time – thus making you proficient, and happy.

Now, that you are into all-things-coding, it’s imperative to make it interesting and fun. Scala fits the bill perfectly. If you are still wondering whether to imbibe the new-age skill, take a look at our itinerary on advanced Scala Training in Delhi displayed on the website and decide for yourself. The world of data science is evolving at a steadfast rate, and it’s high time you learn this powerful productive language to be on the edge.

The blog has been sourced from – www.oreilly.com/ideas/3-simple-reasons-why-you-need-to-learn-scala

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Introducing Scala: A Concise Overview

Posted on January 9, 2019January 9, 2019 by Dexlab

Introducing Scala: A Concise Overview

Developed on Java Virtual Machine, Scala is a remarkable, advanced programming language finding acceptance amongst a fueling developer’s community worldwide. It functions parallel to Java. It has a lot of differences as well as similarities with the Java programming language. Its source code is compiled and exhibits functional programming.

The scope and capabilities of Scala are versatile. From writing web applications to parallel batch processing and data analysis, Scala can be leveraged for a plethora of high-end purposes. But, before going into such nuances, we would advise you to take a brief look at the below-mentioned questions with answers: they will help you grasp the intricacies of Scala and grab the hottest job in town.

Explain Scala?

Scala is a fantastic concoction of object-oriented and functional programming. Together, it combines to construct a cutting-edge programming language that is highly scalable, hence the name ‘Scala’.

Highlight the advantages of using Scala.

Swearing allegiance to its name, Scala is a highly scalable language – supported by maintainability, testability and productivity features – which it makes it an obvious choice over its tailing rivals.
Companion and Singleton objects in Scala offers an improvised solution in contrary to other static in other JVM languages, including Java.
It has the striking ability to eliminate the need to possess a ternary operator.

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Define a Scala Map.

Scala Map is a cluster of key-value pairs, wherein the values can easily be retrieved using the keys. In the map, the values are not unique but the keys are.

Scala supports two types of maps, namely immutable and mutable. By default, Scala endorses immutable map, but no worries, if you want to leverage mutable map, you need to import scala.collection.mutable.Map class, explicitly.

Name the Scala library ideal for functional programming.

Best suited, Scalaz library is hailed perfect for functional programming. Equipped with functional data structures complementing quintessential Scala library parameters, it hosts a healthy stream of pre-determined foundational type classes, including Functor, Monad, etc.

Highlight the difference between ‘Unit’ and ‘()’ in Scala.

Unit is a subset of scala.anyval, which is just a replica of Java void offering Scala with an abstraction of the Java platform. On the other hand, empty tuple, represented as () in Scala defined as a unit value.

What distinguishes concurrency from parallelism?

Most of the laymen confuse the terms concurrency and parallelism. To clear it up, concurrency is a phenomenon when numerous computations perform sequentially at overlapping time periods, while parallelism refers to when processes occur simultaneously. Futures, Parallel collection and Async library are a few examples when parallelism is achieved in Scala.

Define Monad in Scala.

The best way to explain a monad would be by comparing it with a wrapper: just how you wrap a present with a shiny wrapping paper finished with ribbons to make it look attractive, Monad in Scala is used to wrap class objects and fulfill two significant tasks:

Determine through ‘unit’ in Scala
Bind through ‘flatmap’ in Scala

Why do you use Scala’s App?

The App is a trait reflected in Scala package termed as ‘scala.App’, and it determines the main method. When a class or an object goes beyond this trait, they automatically become Scala executable programs, because they acquire the main method directly from the application. No one needs to write the main method when using the App.

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Apache Spark 101: Understanding the Fundamentals

Posted on December 28, 2018December 28, 2018 by Dexlab

Apache Spark 101: Understanding the Fundamentals

Apache Spark is designed to make data science easier. Obviously, the breed of data scientists leverages machine learning – through a set of tools, techniques and algorithms that helps learn from data. Often, these algorithms are iterative, Spark speeds up iterative data processing boosting implementation and analysis.

Introducing Apache Spark

Equipped with a sophisticated and expressive development API, Apache Spark is cutting edge open-source distributed general-purpose cluster computing framework. It lets data specialists to effectively execute machine learning, streaming or SQL workloads. It comes with in-memory data processing engine combined with an advanced APIs for top-notch programming languages, including R, Scala, SQL, Python and Java.

It can also be defined as a distributed, data processing engine ideal for streaming and batch modes exhibiting graph processing, SQL queries and machine learning.

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History

To better understand what Spark offers, it is important to take a look back at the history of Spark. MapReduce used to dominate the sphere before Spark came into existence. It was a robust distributed processing framework that empowered Google to index humongous volume of content on the web, across huge clusters of myriad commodity servers.

A year after a white paper on MapReduce framework was published by Google, Apache Hadoop came into being – the latter was launched in the year 2009 as a project within the AMPLab at the University of California, Berkeley. However, it came into limelight in 2013 – when Apache Software Foundation acquired it as their incubated project and since then Spark has become the most influential project initiated by the Foundation. The community surrounding the project has been flourishing since then – and it includes notable individual contributors and corporate bigwigs, such as IBM, Huawei and Databricks.

Why Did Spark Replace MapReduce?

Interestingly, Spark was developed to keep the advantages of MapReduce intact, while making it easier to implement and more productive.

Benefits of Spark over MapReduce:

Execution in Spark is pretty faster; it caches data in memory from various parallel operations, while MapReduce focuses more on writing and reading from disk.
Across JVM processes, Spark executes multi-threaded tasks, seamlessly, whereas MapReduce feels heavier amidst JVM processes.
Undeniably, Spark supports quick startup, better parallelism and improved CPU utilization.
For an enriching functional programming experience, Spark is preferable.
Notably, Spark is better for using parallel processing of distributed data in association with iterative algorithms.

Who Uses Spark?

Digital natives, like Huawei and IBM, have already invested hugely on Spark adoption, integrating it with their own products. Also, an increasing number of startups have started building businesses around Spark. Prominent Hadoop vendors are – MapR, Cloudera, Databricks and Hortonworks – they have all shifted their focus to support YARN-based Apache Spark.

Web-based organizations, like Chinese search engine giant Baidu, an e-commerce setup Taobao and a social networking company Tencent – all have embraced Apache Spark and generates tremendous amounts of data per day on countless clusters of compute nodes.

Are you looking for the best Apache Spark training center in Gurgaon? You are at the right place! Hope we can help you.

The blog has been sourced from ― mapr.com/blog/spark-101-what-it-what-it-does-and-why-it-matters

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Top Things to Know About Scala Programming Language

Posted on December 27, 2018May 23, 2020 by Dexlab

Top Things to Know About Scala Programming Language

Scalable Language, Scala is a general-purpose programming language, both object-oriented and highly functional programming language. It is easy to learn, simple and aids programmers in writing codes in a simple, sophisticated and type-safe manner. It also enables developers and programmers in being more productive.

Even though Scala is a relatively new language, it has garnered enough users and has wide community support – because it’s touted as the most user-friendly language.

About Scala and Its Features

Scala is a completely object-oriented programming language

In Scala, everything is treated as an object. Even, the operations you conduct are termed as a method call. Scala lets you add new operations to already existing classes – thanks to the implicit classes.

One of the best things about Scala is that it makes it effortlessly easy to interact with Java code. You can easily write a Java code inside Scala class – interesting, isn’t it? The Scala makes way for hi-tech component architectures with the help of classes and traits.

Scala is a functional language

No wonder, Scala has implemented top-notch functional programming concepts – in case you don’t know, in functional programming, each and every computation is regarded as a mathematical function. Following are the characteristics of functional programming:

Simplicity
Power and flexibility
Suitable for parallel processing

Not interpreted, Scala is a compiler-based language

As Scala is a compiler based language, its execution is relatively faster than its tailing competitor, Python. The latter is an interpreted language. The compiler in Scala functions just like a Java compiler. It taps the source code and launches Java byte-code that’s executable across any standard JVM (Java Virtual Machine).

Pre-requisites for Mastering Scala

Scala is a fairly simple programming language and there are minimal prerequisites for learning it. If you possess some basic knowledge of C/C++, you can easily start acing Scala. As it is developed upon Java, the fundamental programming functions of Scala are somewhat similar to Java.

Now, if you happen to know about Java syntax or OOPs concept, it would prove better for you to work in Scala.

Basic Scala Terms to Get Acquainted With

Object

An entity which consists of state and behavior is defined as an Object. Best examples – person, table, car etc.

Class

Described as a template or a blueprint for designing different objects that reflects its behavior and properties, a Class is a widely popular term.

Method

It is reckoned as a behavior of a class, where a class may include one or more methods. For example, a deposit can be reckoned as a method of bank class.

Closure

It is defined as any function that ends within the environment in which it’s defined. A closure return value is determined based on the value of one or more variables declared outside the closure.

Traits

These are used to determine object types by mentioning the signature of the supported methods. It is similar to a Java interface.

Things to Remember About Scala

Scala is case sensitive
When saving a Scala program, use “.scala”
Scala execution process begins from main() methods
Never can an identifier name start with numbers. For an instance, the variable name “789salary” is not valid.

Now, if you are interested in understanding the intricacies and subtle nuances of Apache Spark in detail, you have to enroll for Scala certification Training Gurgaon. Such intensive Scala training programs not only help you master the programming language but ensure secure placement assistance. For more information, reach us at DexLab Analytics, a premier Scala Training Institute in Gurgaon.

The blog has been sourced from ― www.analyticsvidhya.com/blog/2017/01/scala

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