Articles from ADMIN Issue 12
One way several users can share a high-performance system is through a software tool called a resource manager. Openlava is an open source version of a commercial scheduler that is robust while being freely available, very scalable, and easy to install and customize.
Understanding database execution plans is the key to assessing the optimum potential of an SQL query effectively or estimating your future resource requirements.
Creating a virtual machine manually is straightforward but too time consuming if you regularly need to set up many virtual machines. The BoxGrinder and VMBuilder programs let you automate this process.
The new version of Hyper-V sees Microsoft improve and simplify live migration and high-availability options.
Oracle's VirtualBox runs as an application on a host operating system, but the phpVirtualBox web interface and the native Perl/Gtk interface, RemoteBox, both make VirtualBox remotely manageable with a little effort.
The outstanding Netcat is often referred to as the Swiss Army Knife of networking; to say that it is versatile is the biggest understatement you will hear in a while.
Expect is a unique scripting language that emulates keystrokes by responding to expected responses from a local or remote system. Think of Expect as an automated, virtual you.
Parallel programming is not easy, but one tool you can use to help parallelize your application is OpenMP. Most compilers are compatible with OpenMP and allow you to parallelize your code on a single node.
TCP Wrappers are versatile, sophisticated, and surprisingly easy to use, and they can secure your servers from attack with run-time ACL reconfiguration.
This month, we examine a Unix system's stopwatch options.
