Big Data and Business Intelligence have gained momentum over the years and continue to do so. Enterprises are delving deeper into adapting Big Data analytics and also optimize the 3 V’s of Big Data which are Volume, Velocity and Variety. In order to gain more business insight and take better business decisions, it is imperative to balance between gaining volume as well as velocity under a single technical solution. What so ever domain it may be, custom software development, mobile app development, BI and Big Data, it is a difficult job to get relevant outputs under a single roof.
In the world of Big Data solutions, there prevail two different business objects or models – one is the traditional one and the other is the real-time processing. Big Data stalwarts like Apache Hadoop, MapReduce and Storm are known names following these models. But with advancement of technologies, following one of them isn’t sufficient and hence, what comes out as an ideal solution is a combination of both these model – i.e. an hybrid solution. With a concept of ‘getting the best of both worlds’, Nathan Marz created this concept of Lambda Architecture (LA) which gives out a scalable and comprehensive data processing architecture that gives fast results and efficient processing. The entire objective of Lambda Architecture is to build a fault tolerant system which can assess hardware failures and manual mistakes under a wide spread area of implementation.
As far as Apache Hadoop goes, there is availability of HDFS (reliable storage) and a processing system (MapReduce) amongst a whole lot of computers. Volume can be handled by Volume and Velocity can be dealt with real time tools that handle high latency systems with the incoming and outgoing data. LA takes care of merging both the batch and real time systems and make them execute in parallel.
How does Lambda Architecture execute?
Three distinct layers define the architecture for LA: Batch layer, Serving layer and Speed layer. Whatever data comes in for processing through the system goes to the batch layer as well as the speed layer. The batch layer takes care of managing the major master data set (immutable set of raw data) and also pre computing the batch views. The serving layer serves the job of indexing the batch view in order to fire easy queries with low latency. The speed layer handles the existing data and compensates for the high latency of serving layer. The batch and real time views, both in all, assist in finding a solution to any query coming in.
As far as Big Data technologies go, the Lambda Architecture implementation would be done on Apache Hadoop - Big Data with data being appended and batch processing. The other layers like speed and serving layers would be implemented on transactional databases like HBase, Cassandra and so on. A common staging layer with a middleware called Kafka can be used for the fresh data. And the evergreen Apache Storm could be used to process the data streaming in the speed layer.
Major Benefits of Lambda Architecture
At the time of Big Data management, the inclusion of a new layer to its architecture brings in a lot many advantages, such as:
- Accurate and perfect data processing with intact information like alerts, insights and so on.
- There is a fresh layer which is introduced and gains balance by reducing the random write storage requirements.
- Owing to the batch write storage, there is availability for data switching and versioning at certain intervals.
- A chance to overcome human mistakes owing to data sinks of raw data.
- Augmented data extraction to be put on the whole dataset.
- Imbibe immutability and re-computation onto the entire flow.
- An effective architecture which integrates the batch and stream processing and gives a reply to many use cases.
- Ad-hoc queries are executed as per varied types of data to get desired results.
How does Lambda Architecture fit for Big Data architecture?
Lambda Architecture can be applied to a diverse set of Big Data domains, one of which is Hadoop – Big Data framework that lets you store the data and add on fresh records to the master dataset. There need not be a exhaustive system to get individual records, now you just have to keep adding new records to the data set. If it is immutable records, the version of that particular instance is recorded. And newer versions keep getting created at a fresh entry. Hence, it becomes easy to handle bad records in this case.
Overall, Lambda Architecture has proven to be quite a rewarding and constructive model for amalgamating different Big Data analytics and attain multiple enterprise goals and objectives.
AngularJS is a well-known, open source, web application framework for web applications which need HTML, CSS and JS at the client end. It is considered to be HTML enhanced for web apps and Google is the one maintaining and promoting it. Supporting the web apps with MVC (Model View Controller) makes the developing and testing part both simplified. To declare dynamic views in web apps has always been difficult as against static docs in which HTML is most authentic. Here comes AngularJS which allows extension of HTML vocabulary to handle the dynamic views. Its libraries read the tag attributes and follow them. It is a double way binding which makes it an ideal tool for effectively executing client side web apps.
Tools and Frameworks for AngularJS
This is one of the leading test runners for AngularJS, which exhibits all the major features to ensure perfect testing. Certain features that it displays are Testing on real devices such as phones / tablets etc., controlling the entire workflow from the command line or IDE, describing tests with Jasmine / Mocha and other frameworks, owned by the open source community at GitHub, Google Chrome or WebStorm supporting simplistic approach to debug straight from your IDE and CI (Continuous Integration) with Jenkins, Travis or Semaphore.
· Angular Mocks
Considered to be a Namespace from ‘angular-mocks.js’ having testing allied code, it gives support to inject and mock Angular services into our unit tests.
A proficient E2E test framework for Angular apps, Protractor is a testing tool which launches the app in a browser and utilizes Selenium to interact with it.
An enriched JS test framework, Mocha has turned out to be a simplistic and flexible tool which executes on Node.js. With a serial execution, Mocha allows precise and flexible reporting along with exceptions getting mapped to accurate test cases.
This browser framework can be coupled with any JS testing framework and is a BDD / TDD assertion library for node.js. It hooks onto Mocha and provides access to BDD assertions due to an Assertion library.
It lets us quickly allot modules of code amongst files by coupling up all dependencies.
A utility library which delivers steadiness, customization and presentation. These features are utilized to extend JS and simplify its working.
A standalone test spies, stubs and mocks for JS, with minimal dependency – Sinon is compatible with any type of unit testing framework. There is a Stubbing and mocking library. This is utilized to create directive and controller dependencies in unit testing and see if the functions being used are with the right arguments or not.
Definitely one of the most well known frameworks, Angular JS has a full proof share of testing tools to keep it most trustworthy amongst its peers.
iOS, it is one of the most advanced mobile applications on the earth. You can develop any application, whichever is in your mind easily. iOS SDK allow you to develop application in more easier way with high-efficient and advanced features. iOS provide you tolls to develop things universally. You can apply your logic and make thing innovative through iOS application development service. That thing make user to perform their task more rapidly as well as easily.
iOS development become very easy to develop iPhone/iPad applications through its new updated development kit. In today era Hybrid iOS apps are booming. It is kind of native applications. It is the best combination of mobile application technology and web application solution. Major benefits of hybrid iOS applications is that make your device to enable and access mobile web applications such like camera, local storage etc. It is obvious that native applications give you speedy performance compare to this hybrid application. But when thing is about quality preference then you may ignore this drawback of hybrid applications.
Hybrid applications are easier to build by Java and HTML5. If you want to do operations like display and update data then you have to choose hybrid iOS application development service. If compare native applications then they are always complex because it's written into more critical languages so tough to understand and iOS platform gives you a more easy way to develop it quickly.
We can easily understand iOS hybrid application by PhoneGap model. It is one of the open source framework for mobile applications development. It is allow to works onto almost platform like iPhone, Android, Blackberry, Symbain and many more. So Hybrid application provide benefits like execution speed of application, updates delivery become very speedy, testing, work over cross-platforms.
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Author : sarajstanford