【摘要】 磁盘阵列系统中,如何提高I/O传输率一直是一个关键性问题。基于并行性思想,一种伪并行I/O调度策略被应用在带缓存的磁盘阵列系统之中。该调度策略力图在外部I/O请求响应和内部数据迁移之间形成并行操作,最大限度地提高close队列的I/O请求的数据传输率。实验表明,该策略有效地提高了磁盘阵列系统外部I/O通道的持续数据传输率,并在一定程度上缓解了RAID5的小写问题。更多还原

【Abstract】 It is an important key problem all the time that how to boost the I/O performance of the RAID subsystems.A pseudo-parallel I/O schedule is proposed for this problem based on the idea of parallelism.The scheduler is focused to handle the exterior I/O transfer and interior data migration synchronously as far as possible.The experimental results prove that the scheduler is effective to improve the sustained data transfer rate of RAID arrays.Moreover,the scheduler partially settles the problem of small write for RAID5.更多还原