We propose PAIO, the first general-purpose framework that enables system designers to build custom-made Software-Defined Storage (SDS) data plane stages. It provides the means to implement storage optimizations adaptable to different workflows and user-defined policies, and allows straightforward integration with existing applications and I/O layers. PAIO allows stages to be integrated with modern SDS control planes to ensure holistic control and system-wide optimal performance. We demonstrate the performance and applicability of PAIO with two use cases. The first improves 99th percentile latency by 4x in industry-standard LSM-based key-value stores. The second ensures dynamic per-application bandwidth guarantees under shared storage environments.

中文翻译：

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PAIO：软件定义的存储数据平面框架

我们提出了 PAIO，这是第一个使系统设计人员能够构建定制软件定义存储 (SDS) 数据平面阶段的通用框架。它提供了实施适用于不同工作流和用户定义策略的存储优化的方法，并允许与现有应用程序和 I/O 层直接集成。PAIO 允许舞台与现代 SDS 控制平面集成，以确保整体控制和系统范围内的最佳性能。我们通过两个用例展示了 PAIO 的性能和适用性。第一个在基于行业标准 LSM 的键值存储中将第 99 个百分位数的延迟提高了 4 倍。第二个确保共享存储环境下的动态每个应用程序带宽保证。