by haimc
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What Is Safe Mode in HDFS? HDFS is a distributed file system. This means that blocks of the file are replicated between the datanodes of the HDFS, depending on the file's replication factor. The default replication factor in HDFS is 3 (configurable via hdfs-site.xml), so every block is written to...

by rans
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Agile is not as "Hot" as used to be - true or false? Recently, I get a lot of negative attitude toward Agile Development. In many organizations where I was consulting, people use Scrum), but complain about it. Some of the complaints I hear are: There are too many meetings...

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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...

by assafg
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What is Functional programming exactly? Functional programming is a programming style that implements application logic and structures by applying functions... da... you can checkout the Wikipedia definition for a more formal in-depth description but if you want to cut to the chase - read on. The Problem with OOP For...

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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...