Practical web programming

Article describes algorithm of random row selection based on weight, so some rows will be selected more often than other. Article includes sample codes, so I hope will bу helpful to somebody.

Do not hesitate to leave comments if you have ideas how to improve the algorithm.

Many of us sooner or later have to scale our web applications. When we are talking about scalability we are always talking about the data and data storage. There are many options for data storage nowdays as relational databases, key-value storages and document oriented storages , but great part of web applications are using MySQL relational database as the main data storage maibly because of its flexebility. This article describes one of the MySQL scaling approaches - partitioning.