Interfaces for Parallel and Distributed I/O

Pious系统是一个实验性的软件体系结构，用于在异构型并行和分布式计算环境中进行高效的数据管理和I/O。Pious提供具有标准一致性语义的可扩展并发控制，向应用程序呈现并行文件的全局或分段视图，并分离物理数据以提高性能。PROCE中的并发控制基于事务，并允许使用不稳定或稳定的文件访问语义来提高吞吐量或对系统故障的恢复能力。本项目的目标是在PVM消息传递底层上完成并实现虔诚的原型系统。该系统将由一个API库组成，该库旨在呈现熟悉的文件系统语法和语义，同时允许跨多个磁盘设备进行多个并发访问和去集群。然后，通过设计适当的文件系统原语来进一步增强虔诚的基础设施，这些原语将能够有效地实现高级文件访问语义，并允许在分布式联网环境中高效地存储和访问大型结构化和异类数据集。将基于可扩展和灵活的多层体系结构定义适当的文件模型，并将指定一组访问接口；这些方法将作为一套可移植和高效的运行时库和支持软件来实现。***

The PIOUS system is an experimental software architecture for efficient data management and I/O in heterogeneous parallel and distributed computing environments. PIOUS offers scalable concurrency control with standard consistency semantics, presents global or segmented views of parallel files to applications, and declusters physical data for improved performance. Concurrency control in PIOUS is based on transactions, and permits either volatile or stable file access semantics for increased throughput or resilience to system failures. The goal of this project is to complete and implement the PIOUS prototype system on the PVM message passing substrate. The system will consist of an API library that is designed to present familiar file system syntax and semantics, while permitting multiple concurrent accesses and declustering across multiple disk devices. The PIOUS infrastructure will then be further enhanced by designing appropriate file system primitives that will enable the efficient implementation of high level file access semantics and permit large structured and heterogeneous data sets to be efficiently stored and accessed in distributed networked environments. An appropriate file model will be defined, based on an extensible and flexible, multilayered architecture, and will specify a set of access interfaces; these methods will be realized as a suite of portable and efficient runtime libraries and support software. ***