I recently finished Stanford’s excellent free on-line course Introduction
to Databases with Jennifer Widom. The course is a broad survey of database
technology including XML, Relational Database Management Systems (RDBMS) from
many angles (SQL forms the centerpiece of the course), OLAP (OnLine
Analytical Processing) and NoSQL.
I was very impressed with the breadth of Widom’s approach to the subject:
it was a major reason I decided to spend time on the course. Another strength
is its nuts-n-bolts approach: some theoretical topics are covered but for the
most part this is a course for practitioners. Finally, I particularly
appreciated the extensive use of FOSS (Free and Open Source Software) in the
course.
Why study databases? I will merely say that data is a core tool pervading the
information resources of modern civilization. Databases are where data is
housed. Fo... (more)
This is the second of two articles about open source ecommerce software that
we hope will help web developers and system administrators in selecting what
is best for their needs. The first article Top 10 Open Source eCommerce
Software (Joomla and Drupal) reviewed: HikaShop, SimpleCaddy, OpenCart,
redSHOP and RokQuickCart.
The following article details our own analysis of the last 5 vendors in our
article series.
6. VirtueMart – http://virtuemart.net/
Founded in 2005, the company VirtueMart has developed a free and open source
shopping cart software as an extension for Joomla.... (more)
THOUSAND OAKS, CA -- (Marketwire) -- 01/26/12 -- Nexsan®, a leading
independent provider of disk-based data storage systems, today announced that
Connectria Hosting, a global managed hosting company, has deployed the Nexsan
Flexible Storage Platform in support of the company's cloud-based backup
and recovery services for enterprise clients. In combination with CommVault®
Simpana® data and information management software, Nexsan's storage systems
have dramatically improved Connectria's backup and recovery efficiency when
compared to the previously deployed solution.
Connectria H... (more)
Viper Networks, Inc. (Pink Sheets: VPER), in conjunction with LEDs America,
Inc., is pleased to announce the forthcoming market introduction of the 9W
LED, their latest incandescent replacement lamp, which targets the
replacement for 100W incandescent bulbs.
The 9W LED bulb from LEDs America (replaces 100W incandescent bulbs) will
join the other two similar products, including the 5W LED (replaces 60W
incandescent bulbs) and the 4W (to replace 40W incandescent bulbs).
The 9W LED lamp is just the newest product in a series of LED lights from
LEDs America, to provide consumers a su... (more)
Apache and MySQL make up the backbone of many Linux based web servers.
According to the August 2011 Web Server Survey by Netcraft, Apache currently
runs on 65.18% (or 301,771,518!) of web servers. Similarly, MySQL is the
most popular open source database and holds a significant portion of the
market share – especially for web content. This article will detail how
you can get at the ‘low-hanging fruit’ in order to make some simple
changes that will yield big performance gains.
Apache Tuning
If your system is running httpd, the Apache web server, it will definitely
benefit you t... (more)