Author: kundankumarr

Spark: ACID Transaction with Delta Lake

Reading Time: 3 minutes Spark doesn’t provide some of the most essential features of a reliable data processing system such as Atomic APIs and ACID transactions as discussed in the blog Spark: ACID compliant or not. Spark welcomes a solution to the problem by working with Delta Lake. Delta Lake plays an intermediary service between Apache Spark and the storage system. Instead of directly interacting with the storage layer, Continue Reading

Time Travel: Data versioning in Delta Lake

Reading Time: 3 minutes In today’s Big Data world, we process large amounts of data continuously and store the resulting data into data lake. This keeps changing the state of the data lake. But, sometimes we would like to access a historical version of our data. This requires versioning of data. Such kinds of data management simplifies our data pipeline by making it easy for professionals or organizations to Continue Reading

The breaking changes in Dgraph v1.1.0

Reading Time: 4 minutes Dgraph v1.1.0 was released on 3rd September, 2019 with significant changes and new features. So, It becomes important to know these changes that could break our existing code when we try to upgrade Dgraph with the new version. In this blog, we will cover the important changes introduced. We can find all the changes and new features detail in the change-log. 1. Predicates of type UID Continue Reading

Whats new in Dgraph v1.1.0?

Reading Time: 3 minutes In this blog, we will cover the new features Introduced in Dgraph v1.1.0 which was released on 3rd September. We can also find the breaking changes in dgraph v1.1.0 . Also, we can find all the changes and new features detail in the change-log. New Type System This version of Dgraph supports a type system that can be used to categorize nodes and query them based Continue Reading

JSON Web Token (JWT): A Complete Guide

Reading Time: 5 minutes In this blog, we are going to talk about a very powerful yet simple way to represent an user identity securely during a two-party interaction. What I mean to say, when two systems exchange data we can identify an user without having to send private credentials on every request. But how it is possible? The answer is JSON Web Token. So, we are going to Continue Reading