Talking to the audience before the presentation to get a ‘ pulse ’ for what they are looking for, why they come to this session, and so on. Moving towards and away from the audience as you make a specific point.
In general it works well but we had some issues with MySQL running on Xserve (OSX) – mainly DISK IO issues http://moodle.org/mod/forum/discuss.php?d=84559 All the versions of OSX I've played with have very bad disk IO
http://www.sun.com/servers/entry/x4100/specs.xml The Zend Optimizer is a free runtime application that enables PHP to run the files encoded by the Zend Guard . This can be freely used by anyone looking to run encoded applications. Please download and follow the installation instructions included in the distributions. The simplest way to get a PHP runtime that includes Zend Optimizer is to download Zend Core - the leading production quality PHP 5 stack. Zend Optimizer is bundled within Zend Core along with a certified copy of PHP containing the latests bug fixes, Zend's FastCGI technology, a copy of MySQL or DB2 Express-C, and an Apache web server for a easy to install stack.; Zend Core Support Subscription, gives you access to an automated downloads of security and critical fixes and other support features that real PHP applications require. For enterprise-class performance enhancements with an up to x25 increase in server throughput, try Zend Platform . Zend Platform's Performance Enhancement Technology was specifically created to help optimize the responsiveness and processing efficiency of robust, high traffic PHP-based sites. At the same time, Zend Platform's PHP Intelligence Module provides insight into performance bottlenecks and run-time errors. What is ganglia? Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters. It leverages widely used technologies such as XML for data representation, XDR for compact, portable data transport, and RRDtool for data storage and visualization. It uses carefully engineered data structures and algorithms to achieve very low per-node overheads and high concurrency. The implementation is robust, has been ported to an extensive set of operating systems and processor architectures, and is currently in use on thousands of clusters around the world. It has been used to link clusters across university campuses and around the world and can scale to handle clusters with 2000 nodes. MRTG: (http://oss.oetiker.ch/mrtg/) The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network links . MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic. Check http://www.stat.ee.ethz.ch/mrtg/ to see what it does. MRTG for dummies: http://www.netmon.org/dummies.htm