Just these few days I had the opportunity to handle the migration of data for a few web sites. Some were running on the fat cow server. Others were running on the host hi server. All of them were to be ported over to the Vodien server.
The fatcow server has over the past few months proved to be a disappointment, while the hosthi server has all along been a disappointment. Often do I get complains from customers that there web servers are either not loading or their sub domains are showing errors. Come next year I will allow both the fatcow and hosthi accounts to expire. I guess the moral of the story is that if some service providers promise unlimited something, there must seriously be a limited something else somewhere.
While migration of files across servers are easy, the migration of databases and email accounts are somewhat more complicated.
Large MySQL Database migration process
There is an instance where I had to migrated a database that is 100mb in size. To do so via the standard database admin panel called the phpmyadmin would have took forever. Hence I wrote a php script that to fetch a file via a handle
$fp = fopen(“databasedata.sql”, “r+”);
instead of reading in the whole file at one shot.
file_get_contents(“databasedata.sql”);
The latter method would have used up all the allocated resources in a normal php installation unless of course I went ahead and changed the configuration in my php.ini file. However this latter method is not at all a very elegant method to handle the task.
To further expound on the prior method, I coded the script to parse the $fp stream line by line and consolidate them into one big line everytime the latest line does not end with the string chunk ”;\r\n”. In the event this chunk was detected, I will that this consolidated line and execute them to the database.
while (!feof($fp) && $counter<100 ) {
$query .=”\r\n”.trim(fgets($fp));
if(substr($query, -1) ==”;”){
execute_query($query);
$query = “”;
}
}
Lastly to free up unnecessary resources, I closed the stream $fp which I did not need to use anymore.
fclose($fp);
var_dump($myvar);