These are my links for 28 dic 2012 through 9 gen 2013:
PeteNetLive – KB0000741 – HP and Cisco – VLANs and Trunks Confusion! – When I first started in IT, I went and did my Cisco CCNA. So I learned that to connect Cisco switches and pass VLAN traffic between them, I needed to create a 'Trunk' to pass the VLAN traffic. Fast forward a few years, and I now work for an HP reseller. Very early on I came to realise that what HP called a 'trunk' was very different from what I had been taught. Below is an article I did a while ago about setting up HP Trunks.
OpenNOP – Open Network Optimization Platform – OpenNOP is an open source Linux based network accelerator. It's designed to optimise network traffic over point-to-point, partially-meshed and full-meshed IP networks. The goal of OpenNOP is to increase network performance over low speed network connections such as ISDN, DSL, DS1, frame-relay, VPN and other network circuits. To accomplish this we can use a variety of techniques such as compression, deduplication, caching and protocol spoofing. The objectives for OpenNOP are: Produce a low cost solution to increase network performance, improve the end user experience and deliver this in a easy to use appliance image. Provide a single solution for networks on terrestrial, cellular and satellite systems. Facilitate an open framework that can be extended by 3rd party modules to improve specific network traffic.
Deon’s World – Understanding and using htop to monitor system resources – Every so often there will be something that slows a system down. There are a few tools that can help to identify which process is the cause of this slow down. One such tool is htop. Htop is an interactive and real time process monitoring application for Linux which will show you your usage per cpu/core, as well as a meaningful text graph of your memory and swap usage.
Di recente ho avuto modo di lavorare sull'ottimizzazione di un server web, ed è interessante notare come sia possibile ottenere ottimi risultati intervenendo su tre semplici parametri di configurazione del web server Apache:
MaxClients MaxKeepAliveRequests KeepAliveTimeout parametri la cui importanza è spesso sottovalutata e che non sempre garantiscono le migliori prestazioni alle loro impostazioni di default.
IBM devscan tool – United States – The devscan tool is a supplemental tool used by AIX support personnel to gather debugging data for Storage Area Networks. The package download includes a manual page that is also available on this site at the Usage tab.
mysqlreport :: Make easy-to-read MySQL status reports – mysqlreport makes a friendly report of important MySQL status values. mysqlreport transforms the values from SHOW STATUS into an easy-to-read report that provides an in-depth understanding of how well MySQL is running. mysqlreport is a better alternative (and practically the only alternative) to manually interpreting SHOW STATUS.
Percona Online Tools – Welcome to Percona's suite of productivity tools for MySQL database administrators and developers. One free account lets you access all of the tools below, and keeps you updated when new tools or enhancements are available. Registration is required.
Optimize your MySQL Server: Leverage our expertise to create a good starting configuration for a MySQL server. This tool will walk you through all of the steps necessary to create a ready to use MySQL configuration file in about 5 minutes.
Analyze an SQL Query: Find out when your SQL is potentially buggy, hard for MySQL to optimize, or confusing. This tool will analyze your SQL code and warn you when it detects problems that we've encountered while optimizing thousands of queries in real applications.