If you have ever developed serious web applications, you immediately will see a large degree of overlap between the features a CMS offers and the features you expect from a web application server. Most CMS software sits on top of a web application server, using its underlying infrastructure to handle HTTP connectivity, users, groups, permissions and even the database API. In some ways, CMS was the first popular class of application to be deployed on the Web, much as spreadsheets were the first applications used on personal computers.
Overall, it's a good thing CMS software is written on top of an application server, especially in the open-source world. This means you can add new modules to the core CMS, handle new types of documents, change the templates, extend the database and add new types of permissions and work-flow rules. But it's important to remember the difference between an application server and a CMS. The former provides the infrastructure for creating applications, and the latter is an application you can customize.
So if you're looking to create a web-based newspaper, magazine or corporate news site, a CMS is undoubtedly the right type of software for you. But if you want to create a web-based application that tracks donations to your favorite charity, a CMS probably won't provide the flexibility you need. The difference between web applications and web publications has always been a murky one, but as web applications become increasingly sophisticated, CMS software will be recognized as one type of product you can run on a web platform.
Because content management systems normally run on top of an application server, your choice of CMS might depend on the type of server on which it runs. Many companies have moved to J2EE (Java 2 Enterprise Edition) as their underlying platform. Indeed, the well-known Vignette CMS originally was designed to work with Tcl but migrated to J2EE when the buzz surrounding J2EE became too great to ignore. Because J2EE is a standard, rather than a product, customers can choose application servers and CMS software separately. You can use the open-source Tomcat/JBoss duo or the proprietary offerings from companies like BEA or IBM.
If you dislike Java, or if your development team is more familiar with another set of technologies, you might consider a non-J2EE CMS. Such products do exist, and we will look at several of them in the coming months, such as Zope's CMF, the CMF-based Plone, Bricolage (Perl/PostgreSQL), PHPNuke/PostNuke/Xoops (PHP) and Midgard (PHP).
Regardless of what technology you decide to use, a CMS is increasingly necessary and useful for producing web sites. Even if you're the only person working on your web site, moving to a CMS is probably a wise move, if only to help standardize the look, feel and delivery of content on your site. And, if you ever decide to add new types of content, the CMS will probably be able to handle it, though you might need to tinker with it somewhat.
CMS software is probably the first type of application designed for the Web. Most content management solutions are expensive and proprietary, but an increasing number of open-source options are available for those who want greater freedom and lower cost. Given that content management systems normally need a great deal of customizing and tuning, this is another niche for which open-source tools are an excellent fit.
Reuven M. Lerner (email@example.com) is a consultant specializing in open-source web/database technologies. He and his wife Shira recently celebrated the birth of their second daughter, Shikma Bruria. Reuven's book Core Perl was published by Prentice Hall in early 2002, and a second book about open-source web technologies will be published by Apress in 2003.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide