PNP | Rahmat Hidayat

Webometrics the Ranking Web is published twice a year (data is collected during the first weeks of January and July for being public at the end of both months), covering more than 20,000 Higher Education Institutions worldwide.  This is motivation both institutions and scholars to have a web presence that reflect accurately their activities. If the web performance of an institution is below the expected position according to their academic excellence, university authorities should reconsider their web policy, promoting substantial increases of the volume and quality of their electronic publications.

Bogor Agricultural University has present Nasional Seminar on Web Rangking. The material of Seminar, you can download from this website.

1. Dr (h.c.) Isidro F. Aguillo,
   Motivation, Philosophy, Strategy, and Methodology for Webometrics Rangking.
   Presentation of Isidro Aguillo

I’ve been playing with the generic and useless message generated by Joomla 1.5.25 : “Error loading Modules”. This problem appeared while using Jumi, a Joomla plugin enabling custom scripts and file inclusion into articles, to include a php script which performs several sql queries.
I used Joomla + Jumi for a long time, without any problem.

What the hell was causing that weird message? And why no modules were showing in my page? After wasting lot of time googling, I realized something with the MySql connection wasn’t fine. I tried modifying all settings in my.cnf with no luck, I rewrote the script, I reinstalled Jumi… Nothing! Before giving up, I looked into the php.net manuals.

OMG, FOUND THE PROBLEM! Mysql has a “weird” behaviour: if you open 100 connections to 100 different databases in the same server, MySql uses the same connection id for each connection! So if you do
$db1 = mysql_connect($host, $user, $pass);
$db2 = mysql_connect($host, $user, $pass);
mysql_select_db(‘db1′, $db1);
mysql_select_db(‘db2′, $db2);
you get a race condition: only db2 is selected.
That’s why my modules didn’t show !

What to do? My work around to fix the “multiple connections problem” with MySql is the following:
$host1 = “localhost”;
$host2 = “127.0.0.1″;
$host3 = “127.0.0.1:3306″;
$host4 = “localhost:3306″;
$db1 = mysql_connect($host1, $user, $pass);
$db2 = mysql_connect($host2, $user, $pass);
$db3 = mysql_connect($host3, $user, $pass);
$db4 = mysql_connect($host4, $user, $pass);

References:

http://www.matteogiannone.com/blog/2009/11/joomla-1-5-error-loading-modules/ (Italian)