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.
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.
Speeding up Magento with APC or Memcached – Tutorials – Magebase – We often hear complaints about how Magento is slow and performs poorly. Developers know, however, that performance is relative and that we can do a number of things to speed up a Magento site. This article will focus on configuring and using APC and/or Memcached. We have a resources section at the end of this article with links to more performance optimization techniques.
The options obviously also depend on the specific hosting arrangement. I will assume for the purposes of this article, that you have control over your hosting server and are able to install the necessary add-ons and make configuration changes to Apache and PHP. If you are on a shared environment, you may have to check with your hosting support if you can apply the tips from this article. But, you know that you should at least be on a VPS if you are running Magento.
Speed up Magento with simple config tweaks – At Ionata we’ve been using Magento for quite a while now and the more sites we added, the slower our server seemed to become. Magento is quite a big chunk of software and can take up a lot of resources. However after doing some research and carefully tweaking our server configurations, we were pretty amazed to find performance gains of several hundred percent only by changing some settings.
In this post you’ll find a summary of settings that can boost the speed and responsiveness of your Magento installation. Optimisation can be done for PHP, MySQL, Apache and Magento itself.
Apache 2 Basic Configuration on Unix-Like Systems | Nettuts+ – The Apache server is a service that runs in the background, waiting for requests from clients connecting to the ports it listens to, in order to take action. Apache either responds to those requests, or leaves related notes in its log files. Its behavior is controlled through its configuration, using what is known as directives (among other things). We’ll discuss the most basic directives in this article.
These are my links for 23 lug 2012 from 14:20 to 14:37:
Nagrestconf README – What is Nagrestconf?
Nagrestconf is a REST interface and configuration GUI for Nagios.
Nagrestconf is written in Bash and PHP.
allows Nagios configuration files to be written using a REST api.
allows the server to be restarted using the REST api.
provides a configuration Web GUI built on the REST api.
It can be useful for:
Catching common configuration mistakes
Configuration Delegation (using additional tools)
Distributed monitoring (using additional tools)
Not all of the Nagios directives are implemented, refer to the Status section.
Oracle Linux: A better alternative to CentOS – We firmly believe that Oracle Linux is the best Linux distribution on the market today. It's reliable, it's affordable, it's 100% compatible with your existing applications, and it gives you access to some of the most cutting-edge innovations in Linux like Ksplice and dtrace.
But if you're here, you're a CentOS user. Which means that you don't pay for a distribution at all, for at least some of your systems. So even if we made the best paid distribution in the world (and we think we do), we can't actually get it to you… or can we?
We're putting Oracle Linux in your hands by doing two things:
We've made the Oracle Linux software available free of charge
We've created a simple script to switch your CentOS systems to Oracle Linux
We think you'll like what you find, and we'd love for you to give it a try.
configure time service on AIX host – Waldemar Mark Duszyk – First, you have to decide/select the appropriate devices to be your time providers. It could be one or more “official/public” time servers or maybe your routers. When you decide what these servers are you should validate that they deliver what you need and that you are (your host) is capable to receive and use what is delivered.