Database

Defining your workflow: Why Not Airflow?

Reading Time: 4 minutes What is Apache Airflow? Airflow is a platform to programmatically author, schedule & monitor workflows or data pipelines. These functions achieved with Directed Acyclic Graphs (DAG) of the tasks. It is an open-source and still in the incubator stage. It was initialized in 2014 under the umbrella of Airbnb since then it got an excellent reputation with approximately 800 contributors on GitHub and 13000 stars. Continue Reading

Can we do joins in MongoDB?

Reading Time: 3 minutes MongoDB is a NoSQL document database designed for ease of development and scaling. The best part about using a relational DBMS is that we can perform a wide range of relational queries on it. Doing joins on different tables is very easy. But, when we talk about MongoDB, the way data is stored here is quite different from any relational DBMS. How data is Stored Continue Reading

Custom DynamoDB Docker Instance

Reading Time: 3 minutes Hey guys, I hope you all are doing well, I am back with another blog on custom docker instances for databases. In my last blog we saw how we can have our custom docker instance for MySQL. Similarly, in this blog we would look how we can do the same with DynamoDB, so let’s get started. So just like the scenario in previous blog, I Continue Reading

Using Vertica with Spark-Kafka: Writing

Reading Time: 4 minutes In previous blog of this series, we took a glance over the basic definition of Spark and Vertica. We also did a code overview for reading data from Vertica using Spark as DataFrame and saving the data into Kafka. In this blog we will be doing the reverse flow i.e. working on reading the data from Kafka as a DataFrame and writing that DataFrame into Continue Reading

Using Vertica with Spark-Kafka: Reading

Reading Time: 4 minutes We live in a world of Big data where the size of data is so big even for small results. This is the result of an increase in data collection on a rapid scale in the modern world. This massiveness of data brings the requirements of such tools which can work upon such a big chunk of data. I am pretty sure that you guys Continue Reading

Reactive Java: Different flavors of querying the Couchbase using Spring Web Flux Reactive Couchbase API

Reading Time: 3 minutes As I am exploring Spring Web flux these days so I got an opportunity to explore the different ways of interacting with couch base using reactive APIs. We will not discuss how we can make a crud application in Spring Web flux. My main focus will be on, in how many different ways, we can query the couchbase with reactive couchbase API in Spring Web Continue Reading

Delete operation in Dgraph using GRPC

Reading Time: 2 minutes Deletion in dgraph is an easy operation we just have to keep few things in mind before deleting anything in dgraph. Before I explain how can we delete I am going to explain the different scenario. For example, Delete the edge Delete the node. Delete the one value in a list We will take a scenario where we have a person who has the following Continue Reading

Let’s start exploring DGraph – Mutations using JSON

Reading Time: 5 minutes This blog will be aimed towards making the readers aware of how to mutate data in DGraph using the most common data format, JSON. Before diving into the blog, you guys must have basic knowledge and understanding of DGraph – what it is and how to get started with it. I have already written a blog on that as well, which you will be able Continue Reading

Custom MySQL Docker Instance

Reading Time: 2 minutes Hi folks, I am back with another blog, have you ever been in a situation where you required to set up or mimic the current MySQL instance of any environment. Well recently I have been in such a situation and my use case was to test the overall services so I decided to use minikube for service deployment as a whole, now when I had Continue Reading

First steps to build Spring Boot Application with Couchbase

Reading Time: 2 minutes As the name of the blog suggests, we will be taking the first steps to build a simple application from scratch using Couchbase as a database and spring -boot as a framework. Let’s get started. You can create a starter maven project using this link. Add Web, Lombok and Couchbase dependencies. The pom.xml should look like: Let’s run the spring boot application: How to download Continue Reading

Let’s create your first Grafana dashboard

Reading Time: 4 minutes In my previous blog, we discussed the setup of Grafana-Graphite for JMX monitoring.  Now we will create a first Grafana dashboard where we will create Grafana queries to visualize JMX metrics stored in Graphite. As we know, Grafana UI runs on http://localhost:3000/ by default so let’s open the URL in the browser with the default username and password which is admin: admin After login either Continue Reading

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