Red Hat Enterprise Linux 3 with a 2.4 kernel base uses a single, robust, general purpose I/O elevator. The I/O schedulers provided in Red Hat Enterprise Linux 4, embedded in the 2.6 kernel, have advanced the I/O capabilities of Linux significantly. With Red Hat Enterprise Linux 4, applications can [...]

[Dr. Peter Chubb, Project Research Officer - Gelato] Over the last six months, Google has sponsored Gelato to take a close look at the disk chedulers in Linux, particularly when combined with RAID. We benchmarked the four standard Linux disk schedulers using several different tools (see our wiki for [...]

What do you think of when you read the term “scheduler”? If you think of the mechanism that schedules the order in which processes are served, then you already have an idea of what this article is about. The term “scheduler” itself is broad, and in this article we will narrow [...]