Cloud computing is being widely adopted in the industry due to improve resource utilization and provide more computation power. In cloud computing systems, many numbers of users execute various types of applications that produce a large amount of data. To store large data, distributed file systems are used in many cloud computing systems. Recently, to improve the performance of distributed file systems, emerging flash-based solid-state drives (SSDs) are widely adopted since they provide high performance compared with existing hard disk drives (HDDs). However, due to the characteristics of SSDs, the performance of distributed file systems is greatly impacted by the access patterns from the applications. For example, the performance of random writes in SSDs is lower than that of sequential writes. In this article, we propose an address reshaping technique for SSDs in distributed file systems to improve the performance of random writes by transforming the access patterns. Our scheme reshapes random write requests into sequential write requests in the distributed file systems. This enables the distributed file systems to issue the sequential write requests to SSDs. The experimental results show that the proposed scheme improves performance by up to 46.26% compared with the existing scheme.

中文翻译：

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通过访问模式重塑提高基于闪存的 SSD 的分布式文件系统的 I/O 性能

由于提高资源利用率并提供更多计算能力，云计算正在业界广泛采用。在云计算系统中，许多用户执行产生大量数据的各种类型的应用程序。为了存储大数据，许多云计算系统中都使用分布式文件系统。最近，为了提高分布式文件系统的性能，新兴的基于闪存的固态驱动器（SSD）被广泛采用，因为与现有的硬盘驱动器（HDD）相比，它们提供了更高的性能。然而，由于SSD的特性，分布式文件系统的性能很大程度上受到应用程序访问模式的影响。例如，SSD随机写入的性能低于顺序写入的性能。在本文中，我们提出了一种分布式文件系统中 SSD 的地址重塑技术，通过改变访问模式来提高随机写入的性能。我们的方案将随机写入请求重塑为分布式文件系统中的顺序写入请求。这使得分布式文件系统能够向 SSD 发出顺序写入请求。实验结果表明，与现有方案相比，该方案性能提升高达46.26%。