Linux I/O调度器 选择

ANTICIPATORY (AS): This is a decent scheduler, it works well with all file systems, works best on older drives.
DEADLINE: This is a surprising scheduler, it is light and performs the extremely well on most file systems, including reiser4. Works best on newer drives.
CFQ: Only use it on ext3, this scheduler's goal is not performance, but about balancing IO among all resources.