Apache stress test

Sep 10th, 2009 | apache, http, linux | No Comments


Apache includes a very useful tool for hammering the server. It’s called Apache Benchmark “ab” is the binary’s name and it can really hand a server it’s own ass if you don’t watch it.

$ ab -kc 10 -t 30 http://localhost/

That will open 10 connections, use Keep-Alive on them, and then hammer localhost for 30 seconds through those connections. When done,  you get a pretty little chart telling you what broke and how long it took to start screaming. you can increase number of connections or the duration time.

For best results, use it from another machine. You want to not only test the network connection but also leave the server’s CPU and OS to think about serving, not about pulling it down as well.

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Wordpress with one database, same domain, two identical installation on two different machine/network(ipv4/ipv6)

Jul 30th, 2009 | apache, centos, ipv6 | No Comments

Here is the case:

I have already wordpress/blog installation running on httpd with ipv4.(with no ipv6 enabled).
I want everyone with native ipv6 be able accesing my blog.
I have one server already connected to ipv6 via he.net tunnel brokers on different region.

It’s also have httpd listen on both ipv4/ipv6.


So here’s what i have done.

    * I made a backup of wordpress installation on original server.

$ tar cjf wordpress.tar.bz2 wordpress

    * Copy and extract  wordpress backup to ipv6 enabled
      server.(in my case it's extracted on /var/www/html/)

$ tar xjf wordpress.tar.bz2

    * Edit wp-config.php

since wordpress using database on original server. I have to create one user, that can access the database from network.(i’m not going to explain how to do it, it’s not beyond this article scope).

define('DB_NAME', 'database');
define('DB_USER', 'user');
define('DB_PASSWORD', 'password');
define('DB_HOST', 'ip of original machine');
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

    * Create virtualhost on httpd, same as original server.

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