Piyush, Author at Knoldus Blogs

Lagom Framework: The Legacy WordCount Example

March 27, 2017March 27, 2017Big Data and Fast Data, Microservices, Studio-Scalacqrs, event sourcing, lagom, Lagom Architecture, wordcount

Reading Time: 3 minutes What is Lagom? Lagom is an open source micro-service framework, built with Akka message-driven runtime and Play web framework and finally light bend service orchestration. Mixing all these technologies abstracts away the complexities of building, running, and managing microservice architectures. Lagom is a Swedish word meaning “just the right amount”. Often, when people talk about microservices, they focus on the micro part of the name, Continue Reading

Spark Cassandra Connector On Spark-Shell

February 14, 2017Apache Spark, Big Data and Fast Data, Cassandra, Spark, Studio-Scala

Reading Time: 2 minutes Using Spark-Cassandra-Connector on Spark Shell Hi All , In this blog we will see how we can execute our spark code on spark shell using Cassandra . This is very efficient at testing or learning time , where we have to execute our code on spark shell rather than doing on any IDE . Here we will use spark version – 1.6.2 you can download Continue Reading

Transaction Management in Cassandra

February 1, 2017February 1, 2017Big Data and Fast Data, Cassandra, NoSql, Studio-Scala

Reading Time: 4 minutes As we are all from the Sql Background and its been ages SQL rules the market , so transaction are something favorite to us . While Cassandra does not support ACID (transaction) properties but it gives you the ‘AID’ among it . That is Writes to Cassandra are atomic, isolated, and durable in nature. The “C” of ACID—consistency—does not apply to Cassandra, as there is Continue Reading

Cassandra Tips And Techniques

January 31, 2017Big Data and Fast Data, Cassandra, NoSql, Studio-Scala

Reading Time: < 1 minute Tips and Techniques to Load Data in Cassandra Using Java – Driver .
To Implement Pagination Concepts in various Scenarios in Cassandra

Cassandra Counter Column And Table

January 5, 2017January 5, 2017Big Data and Fast Data, Cassandra, NoSql, Studio-ScalaBigData, Cassandra, counter, Counter Table, nosql

Reading Time: 3 minutes Blog Describes the usage of counter column and table in Cassandra .

Solr Relevance Search Using SolrJ In Scala

December 13, 2016December 13, 2016Big Data and Fast Data, Studio-ScalaBigData, Relevance Search, scala, Solr, SolrJ

Reading Time: 3 minutes In this blog we will see how we can perform relevance(or relevant) search in solr using solrj Http API in scala . To give brief what is relevance search : – A developer working on search relevancy focuses on the following areas as the “first line of defense”: Text Analysis: the act of “normalizing” text from both a search query and a search result to Continue Reading

Knolx : MongoDB – Replication And Sharding

November 17, 2016November 17, 2016Database, MongoDB, NoSql, Studio-Scala

Reading Time: < 1 minute Hello all, Knoldus organised a knolx session on the topic “MongoDB – Replication And Sharding” on Friday, 4th november and 11th November 2016. MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemas. MongoDB is developed by MongoDB Inc. and is free and open-source, published under a combination of the GNU Affero General Continue Reading

Cassandra Data Modeling – Primary , Clustering , Partition , Compound Keys

October 18, 2016October 19, 2016Big Data and Fast Data, Cassandra, Database, NoSql, Studio-ScalaArchitecture, Big Data, Cassandra, data modeling, nosql, opensource, scala

Reading Time: 5 minutes In this post we are going to discuss more about different keys available in Cassandra . Primary key concept in Cassandra is different from Relational databases. Therefore it is worth spending time to understand this concept. Lets take an example and create a student table which had a student_id as a primary key column. 1) primary key create table person (student_id int primary key, fname Continue Reading

TITAN DB SETUP WITH CASSANDRA

June 20, 2016Cassandra, Studio-ScalaCassandra, MongoDB, Titan, TitanDb

Reading Time: 4 minutes TITAN DB SETUP WITH CASSANDRA CONNECT AND CONFIGURATION OF TITAN-DB WITH CASSANDRA:- Step 1: Download Cassandra Version: apache-cassandra-3.5 . Downlaod TitanDB Version: titan-1.0.0-hadoop1. Step 2 : Extract both downloads ,say in :- /var/lib/cassandra and /var/lib/titan respectively. Step 3: Configure cassandra: If you’ve installed Cassandra with a deb or rpm package, the directories that Cassandra will use should already be created an have the correct permissions. Otherwise, Continue Reading