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Public vs Private, Amazon Web Services EC2 compared to OpenStack ® How to choose a cloud platform and when to use both The public vs private cloud debate is a path well trodden. While technologies and offerings abound, there is still confusion among organizations as to which platform is suited for their agile needs. One of the key benefits to a cloud platform is the ability to spin up compute, networking and storage quickly when users request these resources and similarly decommission when no longer required. Among public cloud providers, Amazon has a market share ahead of Google, Microsoft and others. Among private cloud providers, OpenStack ®  presents a viable alternative to Microsoft or VMware. This article compares Amazon Web Services EC2 and OpenStack ®  as follows: What technical features do the two platforms provide? How do the business characteristics of the two platforms compare? How do the costs compare? How to decide which platform to use and how to u...

Memcached  is a general-purpose distributed memory caching system. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source (such as a database or API) must be read. Redis  is a flexible, open source and advanced key-value store. It is referred to as a “data structure server” where keys can contain strings, lists, hashes, sets and sorted sets of strings. The main differences between them are listed below: Installation: Comparing ease of Installation Redis is much easier. No dependencies required. Memory Usage: For simple key-value pairs memcached is more memory efficient than Redis. If you use Redis hashes, then Redis is more memory efficient. Persistence: If you are using Memcached then data is lost with a restart and rebuilding cache is a costly process. On the other hand, Redis can handle persistent data. By default, Redis syncs data to the disk at least every 2...

Part 1: Practical Examples Tutorial Series Introduction This tutorial shows you how to configure system services to automatically restart after a crash or a server reboot. The example uses MySQL, but you can apply these principles to other services running on your server, like Nginx, Apache, or your own application. We cover the three most common init systems in this tutorial, so be sure to follow the one for your distribution. (Many distributions offer multiple options, or allow an alternate init system to be installed.) System V  is the older init system: Debian 6 and earlier Ubuntu 9.04 and earlier CentOS 5 and earlier Upstart : Ubuntu 9.10 to Ubuntu 14.10, including Ubuntu 14.04 CentOS 6 systemd  is the init system for the most recent distributions featured here: Debian 7 and Debian 8 Ubuntu 15.04 and newer CentOS 7 Background Your running Linux or Unix system will have a number of background processes executing at any time. These proc...