Google Code University: Learn How To Code / Program

Posted on in Categories C Programming, Howto, News, Open source coding last updated March 19, 2008

Good learning stuff – at no cost!

From the page:

This website provides tutorials and sample course content so CS students and educators can learn more about current computing technologies and paradigms. In particular, this content is Creative Commons licensed which makes it easy for CS educators to use in their own classes.

The Courses section contains tutorials, lecture slides, and problem sets for a variety of topic areas:

* AJAX Programming
* Distributed Systems
* Web Security
* Languages

In the Tools 101 section, you will find a set of introductions to some common tools used in Computer Science such as version control systems and databases.

The CS Curriculum Search will help you find teaching materials that have been published to the web by faculty from CS departments around the world. You can refine your search to display just lectures, assignments or reference materials for a set of courses.

=> Google Code University (via Digg)

Coverity Scan: Security Holes Found in Open Source Projects

Posted on in Categories Links, News, Open source coding, php, programming, Security last updated January 9, 2008
Coverity Logo

Coverity is a company that creates tools for software development. Its premiere product is Prevent, a static-analysis code inspection tool. Coverity offers the results of Prevent’s analysis for free to open source developers.

From the project home page:

In collaboration with Stanford University, Coverity is establishing a new baseline for software quality and security in open source. Under a contract with the Department of Homeland Security, we apply the latest innovations in automated defect detection to uncover some of the most critical types of bugs found in software.

So the most notable use of Prevent is under a U.S. Department of Homeland Security contract, in which it is used to examine over 150 open source applications for bugs. Popular open source projects, such as Samba, the PHP, Perl, and Tcl dynamic languages used to bind together elements of Web sites, and Amanda, the popular open source backup and recovery software running on half a million servers, were all found to have dozens or hundreds of security exposures and quality defects.

For example, over 75% of the defects Scan identified in Samba were fixed within two reviews of the Scan analysis.
Over 75% of the defects Scan identified in Samba were fixed within two reviews of the Scan analysis.
(Fig. 01: Samba Project Code Scan Result)

=> More information about project and bugs (including charts) available at offical web site.

A total of 7,826 open source project defects have been fixed through the Homeland Security review, or one every two hours since it was launched in 2006, according to David Maxwell, open source strategist for Coverity, maker of the source code checking system, the Prevent Software Quality System, that’s being used in the review.

This project is really helping out to improve overall open source software quality.

Linux Fibre Channel over Ethernet implementation code released

Posted on in Categories Linux, Linux Scalability, Linux Virtualization, Networking, Open source coding, Storage last updated December 18, 2007

Intel has just released source code for Fibre Channel over Ethernet (FCoE). It provides some Fibre Channel protocol processing as well as the encapsulation of FC frames within Ethernet packets. FCoE will allow systems with an Ethernet adapter and a Fibre Channel Forwarder to login to a Fibre Channel fabric (the FCF is a “gateway” that bridges the LAN and the SAN). That fabric login was previously reserved exclusively for Fibre Channel HBAs. This technology reduces complexity in the data center by aiding network convergence. It is targeted for 10Gps Ethernet NICs but will work on any Ethernet NIC supporting pause frames. Intel will provide a Fibre Channel protocol processing module as well as an Ethernet based transport module. The Open-FC module acts as a LLD for SCSI and the Open-FCoE transport uses net_device to send and receive packets.

This is good news. I think one can compare bandwidth and throughput for copper and fiber Ethernet. If you are going to use copper you need to stay within 15m of the switch. This solution will try to bring down cost. One can connect to 8-10 server to central database server with 10G and there could be few more applications.

=> Open FCoE project home page