Linux find command The Linux find command is a very useful and handy command to search for files from the command line. It can be used to find files based on various search criterias like permissions, user ownership, modification date/time, size etc. In this post we shall learn to use the find command along with… Read More »
Answers to some of the most important questions surrounding the term “enterprise service bus” using concrete examples, so that the areas of application that can be deemed “correct” for ESBs can be clarified. Part of the Industrial SOA article series July 2013 Introduction Everyone seems to need to use an enterprise service bus (ESB) nowadays,… Read More »
We all are very familiar with Apache web server, it is a very popular web server to host your web files or your website on the web. Here are some links which can help you to configure Apache web server on your Linux box. Apache Security and Hardening Tips Install Apache Web Server Setup Your… Read More »
Now that the installation is complete and verified, let us look into the configuration of the module. mod_evasive can be easily customized through the mod_evasive.conf configuration file. We will discuss some of the configuration parameters in this tutorial. Please refer to the configuration file for information on all the parameters — it contains a description… Read More »
In this article I’ll explain (with code) how to create and validate a Google Authenticator two-step authentication token, using Perl. Both on the command-line and on a simple website. Some background Google Authenticator is a two-step authentication process created by Google. It’s software based, unlike those hardware tokens your bank may use, and when paired… Read More »
This method is a bit complicated, but does not require an add-on like the other answer. I figured this out using the info from here, but doing a different method to make it work with a column chart. Essentially, the way this works is that you create a data set which corresponds to the category… Read More »
Nathan Marz came up with the term Lambda Architecture (LA) for a generic, scalable and fault-tolerant data processing architecture, based on his experience working on distributed data processing systems at Backtype and Twitter. The LA aims to satisfy the needs for a robust system that is fault-tolerant, both against hardware failures and human mistakes, being… Read More »
Lambda Architecture: A state-of-the-art It’s been some time now since Nathan Marz wrote the first Lambda Architecture post. What has happened since then? How has the community reacted to such a concept? What are the architectural trends in the Big Data space, as well as the challenges and remaining problems? Big Data: Batch processing-only Despite… Read More »
This is guest post by John Piekos, VP Engineering atVoltDB. I understand this is a little PRish, but I think the ideas are solid. The focus of many developers and architects in the past few years has been on Big Data, specifically mining historical intelligence from the Data Lake (usually a Hadoop stack containing terabytes… Read More »