Reading our previous article on OpenVPN may be practical to many of the readers. You need to configure a non-root user with sudo privileges and ideally another server to certificate authority (CA). How to Create Own Certificate Authority (CA) With EasyRSA is a separate guide which is mandatory to read before proceeding with this guide. Also, try to follow our guide on Initial Cloud Server Setup … [Read more...]
Cloud Computing
Cloud computing is becoming more and more important. Here are articles on Cloud Computing,Cloud Server,SaaS,PaaS,IaaS and Cloud related technology.
How to Create Own Certificate Authority (CA) With EasyRSA
A certificate authority (CA) is who issues the digital certificates. We need this for installation of some software, such as OpenVPN. For doing that, we have to download the latest version of EasyRSA. EasyRSA is the CLI utility to build and manage a PKI CA. A CA acts as a trusted 3rd party. The format of these certificates is specified by the X.509 standard. A certificate signed by a … [Read more...]
Apache Cassandra Versus Apache Phoenix
In our previous discussions, we have compared Apache Cassandra with Apache Hbase and Apache Cassandra with MongoDB. In one of those articles, we already mentioned that Apache Cassandra is more appropriate to compare with Apache Phoenix than Apache HBase. Also, it will make understand why commonly HBase is compared with Apache Cassandra, not Apache Phoenix. Apache Phoenix is a relational … [Read more...]
Apache Cassandra vs Apache HBase
In the last article we have compared Cassandra with MongoDB. That comparison made it obvious that we need to compare Cassandra with HBase, and MongoDB with HBase to complete the understanding. Cassandra and HBase are similar at many things but Cassandra's consistency model is like DynamoDB to provide eventual consistency. HBase is a part of HDFS which runs on top of Hadoop (based on … [Read more...]
MongoDB vs Cassandra : Comparison of NoSQL Databases
Previously we compared DynamoDB and MongoDB. MongoDB vs Cassandra is another frequently compared NoSQL database. Apache Cassandra is fully Free and Open Source Software which provides scalability. MongoDB is developed by MongoDB Inc, it has other options than just the MongoDB Open Source Software we commonly use. Apache Cassandra has scalability, linear performance, distributed architecture, … [Read more...]
What’s the Difference Between Hadoop and Spark?
Both Apache Hadoop and Apache Spark are big-data frameworks, but they do not serve the same purposes. Actually there are multiple big data frameworks on the market, Apache and Hadoop and Apache Spark are most known among them. They are commonly used to train the starters. But in real life, choosing the right big data framework is a challenge. Businesses consider each of the framework for their … [Read more...]
What is Scaled Agile Framework (SAFe)?
Scaled Agile Framework (SAFe) is an organization and process schema for large-scale deployment of Agile and Lean methods. SAFe tries to answer the problem of large organizations (companies or administrations) who wish to work together several Agile teams. SAFe also aims to deploy Agile and Lean culture and practices across all layers of the organization, from management to developers. Inspired … [Read more...]
What is Predictive Analysis?
Predictive analysis is a group of analysis which uses machine learning, data mining, statistical algorithms to analyze data to make predictions. The goal of predictive analysis is to cross the capability of descriptive statistics and reporting and provide the best assessment on what will happen in the future. The end result helps in streamline decision making and produce new insights. Predictive … [Read more...]
What is ETL (Extract, Transform and Load)?
Extract, Transform and Load (ETL) is the process which allows the organizations to move data from multiple sources, reformat, clean them, load them into another database, data mart, or data warehouse to analyze, or in use in another operational system to support a business process. ETL processes can also be used for integration with legacy systems. They became a popular concept in the … [Read more...]
Basics on User Behavior Analytics
User behavior analytics (UBA) is a cybersecurity process around detecting threats, attacks, and fraud. These solutions watch the patterns of human behaviour and apply different statistical analysis to detect abnormalities from patterns which may indicate threats. User Behavior Analytics is closer to Security and Information Event Management. Security and Information Event Management focus on … [Read more...]