Small Overview About the Druid?

What is Druid?

Druid is a column-oriented, open-source, distributed data store written in Java. Druid is designed to quickly ingest massive quantities of event data, and provide low-latency queries on top of the data.

Druid is a high-performance, column-oriented, distributed data store.

Benefits:

Interactive Queries
Real-time Streams
Horizontally Scalable
Deploy Anywhere
Vibrant Community

It is primarily used for business intelligence (OLAP) queries on event data. Druid provides low latency (real-time) data ingestion, flexible data exploration, and fast data aggregation. Existing Druid deployments have scaled to trillions of events and petabytes of data. Druid is most commonly used to power user-facing analytic applications.

Key Features

Sub-second OLAP Queries
Real-time Streaming Ingestion
Power Analytic Applications
Cost Effective
Highly Available
Scalable Existing

Video for Druid

Overview About MongoDB?

What is Mongodb?

MongoDB is an open-source database used by companies of all sizes, across all industries and for a wide variety of applications. It is an agile database that allows schemas to change quickly as applications evolve, while still providing the functionality developers expect from traditional databases, such as secondary indexes, a full query language and strict consistency.

MongoDB is a document database that provides high performance, high availability, and easy scalability.

MongoDB is the leading NoSQL database, empowering businesses to be more agile and scalable. Fortune 500 companies and startups alike are using MongoDB to create new types of applications, improve customer experience, accelerate time to market and reduce costs.

Features for MongoDB

Json style documents
Index on any attribute
Rich quries
In-place update
Auto sharding
Map reduce
GridFS to store files
Capped collections

Advantages of MongoDB over RDBMS

Schema less : MongoDB is document database in which one collection holds different different documents. Number of fields, content and size of the document can be differ from one document to another.

Structure of a single object is clear

No complex joins

Deep query-ability. MongoDB supports dynamic queries on documents using a document-based query** language that's nearly as powerful as SQL

Tuning

Ease of scale-out: MongoDB is easy to scale

Why should use MongoDB

Document Oriented Storage : Data is stored in the form of JSON style documents
Index on any attribute

Replication & High Availability

Auto-Sharding

Rich Queries

Fast In-Place Updates

Professional Support By MongoDB

Where should use MongoDB?

Big Data
Content Management and Delivery
Mobile and Social Infrastructure
User Data Management
Data Hub

Video Tutprial for what is mongo db?

http://www.youtube.com/watch?v=liQzIsFnCr0

Small discussion about Redis?

What is Redis?

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries.

Due to its speed and ease-of-use, Redis is a popular choice for Web, Mobile, Gaming, Ad-Tech, and IoT applications that require best-in-class performance. AWS provides Redis support through a fully managed and optimized database service called Amazon ElastiCache for Redis, and also allows customers to run self-managed Redis on AWS EC2.

Main Benefits

Blazing fast performance
In-memory data structures
Versatility and ease-of-use
Replication and Persistence
Support for your favorite development language

Redis also supports trivial-to-setup master-slave asynchronous replication, with very fast non-blocking first synchronization, auto-reconnection with partial resynchronization on net split.

Features

Transactions
Pub/Sub
Lua scripting
Keys with a limited time-to-live
LRU eviction of keys
Automatic failover

Redis is written in ANSI C and works in most POSIX systems like Linux, *BSD, OS X without external dependencies. Linux and OS X are the two operating systems where Redis is developed and more tested

Redis may work in Solaris-derived systems like SmartOS, but the support is best effort. There is no official support for Windows builds, but Microsoft develops and maintains a Win-64 port of Redis.

Video for getting started with Redis

https://www.youtube.com/watch?v=7W1n_SwTw14

Small Discussion About Neo4J?

What is Neo4J?

Neo4j is a graph database management system developed by Neo Technology, Inc. Described by its developers as an ACID-compliant transactional database with native graph storage and processing, Neo4j is the most popular graph database according to db-engines.com.

Neo4j is an open-source NoSQL graph database implemented in Java and Scala. With development starting in 2003, it has been publicly available since 2007

Neo4j is used today by hundreds of thousands of companies and organizations in almost all industries. Use cases include matchmaking, network management, software analytics, scientific research, routing, organizational and project management, recommendations, social networks, and more.

Neo4j implements the Property Graph Model efficiently down to the storage level. As opposed to graph processing or in-memory libraries, Neo4j provides full database characteristics including ACID transaction compliance, cluster support, and runtime failover, making it suitable to use graph data in production scenarios.

Benefits:

Property graph data model
Graph-specific query language
Graph-specific visualization and tooling
Graph-specific storage engine
Graph-specific processing engine
Graph-specific scalability features
Graph-specific enterprise user security
High-Performance Query Execution

Features:

Cypher Query Language
Scale and Performance
Advanced Causal Clustering*
Built-in Tooling & Visualization
Drivers for Popular Languages & Frameworks
Seamless Data Import
Cloud-Ready Deployment
Elastic Scalability*
In-Memory Page Cache*
Hot Backups*

Video for Neo4J

https://www.youtube.com/watch?v=U8ZGVx1NmQg

Small overview about Machhina IOT?

What is Macchina?

Macchina is an open source software toolkit for quickly building embedded applications for the Internet of Things that run on Linux-based IoT gateways and devices like the Raspberry Pi, Beaglebone, RED Brick or Galileo/Edison.

Macchina implements a web-enabled, modular and extensible JavaScript and C++ runtime environment and provides easy to use building blocks that enable applications to talk to various sensors and devices, as well as cloud services.

Rapidly build IoT device applications in JavaScript and/or C++. Reliable and rock-solid, based on industry proven components like the POCO C++ Libraries and the V8 JavaScript engine. Implemented in C++ for maximum efficiency.

Runs on Embedded Linux devices with as little as 32 MB of RAM, as well as desktop Linux and OS X. Develop and test on desktop machine, then easily deploy to embedded device.

It runs on Linux-based devices, including IoT gateways, industrial computing devices, and prototyping platforms like the Raspberry Pi, Beaglebone and MangOH.

It is based on the POCO C++ Libraries and uses the V8 JavaScript engine.

Video for Macchina

https://www.youtube.com/watch?v=vhfu38AyMPU

Small Overview about Expo CLI?

What is Expo CLI?

Expo CLI is a command line interface for developing Expo apps. It also includes a web-based interface (Expo Dev Tools) for using some of the most often used features also from a quick to use graphical interface.

Expo apps are React Native apps which contain the Expo SDK. The SDK is a native-and-JS library which provides access to the device's system functionality (things like the camera, contacts, local storage, and other hardware). That means you don't need to use Xcode or Android Studio or write any native code, and it also makes your pure-JS project very portable because it can run in any native environment containing the Expo SDK.

Expo also provides UI components to handle a variety of use-cases that almost all apps will cover but are not baked into React Native core, e.g. icons, blur views, and more.

Finally, the Expo SDK provides access to services which typically are a pain to manage but are required by almost every app. Most popular among these: Expo can manage your Assets for you, it can take care of Push Notifications for you, and it can build native binaries which are ready to deploy to the app store.

Video for Expo CLI

https://www.youtube.com/watch?v=cWZHjuKTg7g

Small overview about Vue Native?

What is Vue Native?

Vue Native is a framework to build cross-platform native mobile apps using JavaScript. Vue Native is a mobile framework to build a truly native mobile app using Vue.js. It is designed to connect React Native and Vue.js.

Vue Native is a wrapper around React Native APIs, which allows you to use Vue.js and compose rich mobile User Interface.

Vue is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only and is easy to pick up and integrate with other libraries or existing projects.

Features

Declarative rendering
Two-way binding
The goodness of Vue ecosystem
Compiles to React Native
Completeness of React Native ecosystem

A video for Vue Native

https://www.youtube.com/watch?v=8e0XHPylhj0

Small Overview about Mezzanine?

What is Mezzanine?

Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework, Mezzanine provides a simple yet highly extensible architecture that encourages diving in and hacking on the code. Mezzanine is BSD licensed and supported by a diverse and active community.

In some ways, Mezzanine resembles tools such as Wordpress, providing an intuitive interface for managing pages, blog posts, form data, store products, and other types of content. But Mezzanine is also different. Unlike many other platforms that make extensive use of modules or reusable applications, Mezzanine provides most of its functionality by default. This approach yields a more integrated and efficient platform.

Features

Hierarchical page navigation
Save as draft and preview on site
Scheduled publishing
Drag-and-drop page ordering
WYSIWYG editing
In-line page editing
Drag-and-drop HTML5 forms builder with CSV export
SEO friendly URLs and metadata
E-commerce / Shopping cart module (Cartridge)
Configurable dashboard widgets
Blog engine
Tagging
Free Themes, and a Premium Themes Marketplace
User accounts and profiles with email verification
Translated to over 35 languages
Sharing via Facebook or Twitter
Multi-lingual sites
Custom templates per page or blog post
Twitter Bootstrap integration
API for custom content types
Search engine and API

Mezzanine is an open source project managed using both the Git and Mercurial version control systems.

Video for Mezzanine blogging

https://www.youtube.com/watch?v=3I5nrcsy7RI

Small Overview About the Druid?

References

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Advantages of MongoDB over RDBMS

Why should use MongoDB

Where should use MongoDB?

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