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Cassandra Scheme Update In the world of RDBMS when we have a database with a scheme we have the issue of how to manage changes in the scheme. When updating our product, we also need the option to update our database scheme. For this we have tools like liquibase and...

by orenk
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I was recently consulting a client. Long garbage collections cycles triggered the client failover to switch server, since the server was idle for too long. My task was to improve the garbage collection. The tuning task took several iterations, in each step there was something new to learn. There are...

by Royb
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In every programmer’s life comes a time where they need to know if words from a defined set of words appear in input texts. Today, we’ll see how to do it using a naïve solution, and efficiently using Aho-Corasick algorithm. Real world usage I recently used Aho-Corasick algorithm myself. I...

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Batch with Salesforce The task I was given a task that seemed to be very simple. We had some logic that would collect accounts from the CRM so that we could then send Emails and SMS to contacts on the account. Since all the work seemed to be CRM only...

by rans
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Data Processing - Streaming Vs. Batch In today's big data world, we need to process a lot of data in high volumes. There are some very good frameworks for data processing. Just to name some: Apache Hadoop for batch processing, Apache Storm for data streaming, Apache Spark that can do...

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Following the successful FullStack event with over 300 RSVP members, we are happy to share the video. Introduction to Reactive Architecture by Assaf Gannon. In this talk we will go over the key concepts of Reactive Architecture and how they are implemented in solving real life problems. 

by rans
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This workshop is taken by Ran Silberman. Here is the agenda for this session : Presentatio: Short introduction to Hadoop, Hadoop ecosystem in brief, Future of Hadoop, Hands-on, Installing Hadoop, Writing MapReduce program, Debug MapReduce in Hadoop, Deploy Program on the cluster, Work with management and monitoring tools. Prerequisites for...

by yoavn
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We are happy to share this great video lecture by Yoav Nordman. In this session, we will cover the new Java 8 concurrency features which add a boost to performance. The following topics will be reviewed: Understand how to use the powerful new parallel streams feature Enhance performance utilizing new...

by yanai
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This workshop will be taken by Yanai Franchi. "In this session we’ll follow a real world use case, which started as a classic monolithic Java application. We’ll discuss some of the difficulties inherited from this architecture, and alternatives to split it up into cohesive microservices. We will re-architecture the application...

by rans
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Calculate Average value in WordCount MapReduce on Hadoop In this post I show how to calculate average value of counters in a Java program that runs Map-Reduce over hadoop. The famous example of Word Count that can be found here shows a simple MapReduce that sets counter of words. Here...